Performing a Basic Signal Generator Measurement

Performing a Basic Signal Generator Measurement

Step
Notes

1
Mode

2
[Spectrum Analyzer/Tools]

3
[Signal Generator]

4
[Chan Std]

5
Select the channel standard from the list using the up and down arrow buttons.

6
[Select]

7
On [Units] select Chan.
Each time you press this menu key, the analyzer switches between Channel (Chan) and Frequency (Freq). The Units settings are coupled across multiple tools.

8
[Fr/Time Ref]
Complex signals such as cdma and 1xEV-DO require accurate time and frequency references before they can be reliably generated or demodulated.

9
[GPS] or [External Even Sec]
Only GPS and External Even Second provide the timing information necessary to generate an accurately modulated signal. Select GPS if you are receiving GPS location information (System, [Fr/Time Ref Location], [Show GPS Location] set to On). Otherwise, select External Even Second, and connect your external even second reference signal to the Even Second Sync In port on your test set. It is worth noting that the signal may disappear momentarily when you switch between different time references because the signal needs to be realigned with the system time.
If you are not needing a time aligned signal (for example, you are simply generating a carrier wave), you do not need to use either GPS or External Even Second Clock as your time reference.
If you are using a frequency only reference, the signal will be modulated with the same accuracy as when using a time reference. The difference is that it will not be time aligned to the system time during playback

10
[Select]

11
[Channel]

12
Enter the channel number using the numeric keypad.
When the channel is set, it is set across all the test set tools, so as you switch between tools, the channel is preset.

13
[Rev] or [Up]
Always choose the reverse or the uplink channel when performing a receiver sensitivity test measurement.The terms "Reverse link" and "Uplink" have the same meaning. GSM standards use the term "Up" whereas cdma standards use the term "Reverse".

14
[Modulation]
If the key is grayed out, go to step 16.

Or

If the key is active, go to the next step.
If the [Modulation] menu key is grayed out, your test set does not include the Option 510 - CW & Complex Modulation Signal Generator. You have only CW source.

15
[Format]
You will now see a list of all the available signal formats:
CW (No modulation) - an unmodulated carrier wave
CDMA Forward Link (Pilot only) without Equalization Filter
CDMA Forward Link (Pilot only) with Equalization Filter
CDMA IS-95 Reverse Link - RC1 9.6Kbps Zero Data Traffic Channel
CDMA IS-95 Reverse Link - Zero Data Access Channel
CDMA IS-95 Reverse Link - RC1 9.6Kbps Random Data Traffic Channel
CDMA IS-95 Reverse Link - RC2 14.4Kbps Zero Data Traffic Channel
R-FCH RC3 Zero Data Fundamental Channel
R-FCH RC3 Random Data Fundamental Channel
iDEN Inbound 1/6 Duty Cycle 16QAM (ARB)
1xEV-DO Reverse Link 9.6Kb 15PN data (ARB) - parameters such as PN Offset are fixed in this file and cannot be altered. Be aware that it can take up to 30 seconds for a 1xEV-DO signal to start being generated.^a
1xEV-DO Rev A Reverse Link 9.6Kbps 15PN data (ARB)^a
1xEV-DO Rev A Reverse Link 460.8Kbps 15PN data (ARB).

16
Select the signal format from the list using the up and down arrow keys.

If you have selected a CDMA Forward Link modulation type, select PN Offset. For other modulation types, you do not need to select PN Offset.
If you have selected cdma2000 modulation with fundamental channels, you also need to press [R-FCH Pwr].
The PN Offset is a "short code" sequence that provides a unique identifier for each sector of each cell site. The PN Offsets are applied to the I and Q signals before modulation. PN Offsets are offset in time by 52.08 µs and they repeat every 26.666 ms. This yields 512 unique short code sequences (0-511). The mobile phone needs the PN Offset to decode information in the Sync and Paging channels, which are transmitted by the base station.
R-FCH Pwr specifies the Reverse Fundamental Channel Power, and applies only to cdma-2000 RC3 channels. It does not apply to cdma IS-95 RC1 and cdma IS-95 RC2 reverse link channels.

17
Enable the RF output, set the RF output amplitude, and set the step key increments.

[Amplitude]
[RF] Select On.
[Amplitude]
Enter the amplitude value using the numeric keypad.
[dBm]
[Ampl Step]
Enter the step value using the numeric keypad.
[dB]
You may also enter a new value for amplitude by turning the rotary knob until the desired value is displayed or by using the up and down arrow keys.

18
If you have previously stored RF Out Loss from an insertion loss measurement, go to the next step.

Or

Press [RF OUT Loss] to select On and enter the RF Out Loss value.
For information on the effects of the RF Out Loss function on the amplitude, refer to "Using the RF Out Loss field" below.
Each time you press this softkey, the selected option changes.

19
Connect to the base station.

20
On [RF] select On.
Each time you press this softkey, the selected option changes.

NOTE: The characteristics of any 1xEV-DO signal generated are:

RRI Active: RRI Bits: 1
DRC Channel Relative Gain: +3 dB
ACK Channel relative Gain: 0 dB
Data Channel Relative Gain: +3.75 dB
Data Channel: Active
Data Channel Data Rate: 9.6 kbps
Data Channel Data Rate (High Speed Signal: 460.8 kbps at payload size 12288 bits
Data Channel bit stream: PN15
I Mask: 3FF80000000
Q Mask: 3FF00000001
Filter Type: IS 95 Std


	Step	Notes
1	Mode
2	[Spectrum Analyzer/Tools]
3	[Signal Generator]
4	[Chan Std]
5	Select the channel standard from the list using the up and down arrow buttons.
6	[Select]
7	On [Units] select Chan.	Each time you press this menu key, the analyzer switches between Channel (Chan) and Frequency (Freq). The Units settings are coupled across multiple tools.
8	[Fr/Time Ref]	Complex signals such as cdma and 1xEV-DO require accurate time and frequency references before they can be reliably generated or demodulated.
9	[GPS] or [External Even Sec]	Only GPS and External Even Second provide the timing information necessary to generate an accurately modulated signal. Select GPS if you are receiving GPS location information (System, [Fr/Time Ref Location], [Show GPS Location] set to On). Otherwise, select External Even Second, and connect your external even second reference signal to the Even Second Sync In port on your test set. It is worth noting that the signal may disappear momentarily when you switch between different time references because the signal needs to be realigned with the system time. If you are not needing a time aligned signal (for example, you are simply generating a carrier wave), you do not need to use either GPS or External Even Second Clock as your time reference. If you are using a frequency only reference, the signal will be modulated with the same accuracy as when using a time reference. The difference is that it will not be time aligned to the system time during playback
10	[Select]
11	[Channel]
12	Enter the channel number using the numeric keypad.	When the channel is set, it is set across all the test set tools, so as you switch between tools, the channel is preset.
13	[Rev] or [Up]	Always choose the reverse or the uplink channel when performing a receiver sensitivity test measurement.The terms "Reverse link" and "Uplink" have the same meaning. GSM standards use the term "Up" whereas cdma standards use the term "Reverse".
14	[Modulation] If the key is grayed out, go to step 16. Or If the key is active, go to the next step.	If the [Modulation] menu key is grayed out, your test set does not include the Option 510 - CW & Complex Modulation Signal Generator. You have only CW source.
15	[Format]	You will now see a list of all the available signal formats: CW (No modulation) - an unmodulated carrier wave CDMA Forward Link (Pilot only) without Equalization Filter CDMA Forward Link (Pilot only) with Equalization Filter CDMA IS-95 Reverse Link - RC1 9.6Kbps Zero Data Traffic Channel CDMA IS-95 Reverse Link - Zero Data Access Channel CDMA IS-95 Reverse Link - RC1 9.6Kbps Random Data Traffic Channel CDMA IS-95 Reverse Link - RC2 14.4Kbps Zero Data Traffic Channel R-FCH RC3 Zero Data Fundamental Channel R-FCH RC3 Random Data Fundamental Channel iDEN Inbound 1/6 Duty Cycle 16QAM (ARB) 1xEV-DO Reverse Link 9.6Kb 15PN data (ARB) - parameters such as PN Offset are fixed in this file and cannot be altered. Be aware that it can take up to 30 seconds for a 1xEV-DO signal to start being generated.^a 1xEV-DO Rev A Reverse Link 9.6Kbps 15PN data (ARB)^a 1xEV-DO Rev A Reverse Link 460.8Kbps 15PN data (ARB).
16	Select the signal format from the list using the up and down arrow keys. If you have selected a CDMA Forward Link modulation type, select PN Offset. For other modulation types, you do not need to select PN Offset. If you have selected cdma2000 modulation with fundamental channels, you also need to press [R-FCH Pwr].	The PN Offset is a "short code" sequence that provides a unique identifier for each sector of each cell site. The PN Offsets are applied to the I and Q signals before modulation. PN Offsets are offset in time by 52.08 µs and they repeat every 26.666 ms. This yields 512 unique short code sequences (0-511). The mobile phone needs the PN Offset to decode information in the Sync and Paging channels, which are transmitted by the base station. R-FCH Pwr specifies the Reverse Fundamental Channel Power, and applies only to cdma-2000 RC3 channels. It does not apply to cdma IS-95 RC1 and cdma IS-95 RC2 reverse link channels.
17	Enable the RF output, set the RF output amplitude, and set the step key increments. [Amplitude] [RF] Select On. [Amplitude] Enter the amplitude value using the numeric keypad. [dBm] [Ampl Step] Enter the step value using the numeric keypad. [dB]	You may also enter a new value for amplitude by turning the rotary knob until the desired value is displayed or by using the up and down arrow keys.
18	If you have previously stored RF Out Loss from an insertion loss measurement, go to the next step. Or Press [RF OUT Loss] to select On and enter the RF Out Loss value.	For information on the effects of the RF Out Loss function on the amplitude, refer to "Using the RF Out Loss field" below. Each time you press this softkey, the selected option changes.
19	Connect to the base station.
20	On [RF] select On.	Each time you press this softkey, the selected option changes.