3156B User Manual
Racal Instrument © 2005
Maintenance and Performance Checks 6-21
Sweep
Equipment
: Oscilloscope (LeCroy LT342, fitted with jitter package)
Preparation
:
1. Configure the oscilloscope as follows:
Time Base:
0.1 ms
Sampling Rate: 50MS/s at least.
Trace A View: Jitter, Type: FREQ, CLK.
Trigger source: Channel 2, positive slope
Amplitude:
1V/div
2. Connect 3156B Channel 1 output to the oscilloscope input,
channel 1
3. Connect the 3156B SYNC output to the oscilloscope input,
channel 2
4. Configure the 3156B channels 1/2 as follows:
Reset
Wave Mode: Modulation
Modulation Mode: Sweep
Start
Frequency:1MHz
Stop
Frequency:
2MHz
Sweep
Time: 1ms
Sweep
Type: Linear
Sync:
On
Output:
On
Enable:
On
Test Procedure
1. Verify FSK operation on the oscilloscope as follows:
Waveform: Ramp
Up
Period:
10kHz
Max
A:
2MHz
Min
A:
1MHz
Test Results
Pass
Fail
2. Move 3156B sweep marker position to 1.5MHz and verify marker
position at the middle of the ramp
Test Results
Pass
Fail
3. Reverse between Start and Stop frequencies and verify
oscilloscope reading as before except the ramp is down
Test Results
Pass
Fail
Содержание 3156B
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