Manual - 8500A Series Peak Power Meter - Giga-tronics

Testing and Calibration
5.3.10 External Interface
A. Monitor Outputs.
1. Connect a terminated coaxial cable from the MONITOR output on the back of the PPM to the
Scope (channel A if the unit is an 8502A).
2. The Scope display should look like the pulse displayed on the PPM Graphics display with the
amplitude representing the buffered detector signal.
3. If the unit being tested is an 8502A:
a. Disconnect the channel A detector from the Signal Generator.
b. Connect the channel B detector to the Signal Generator.
c. Select B channel AUTOSCALE by pressing [B] [GRAPH].
d. Move the coaxial cable from the A channel MONITOR output to the B channel MONITOR
output on the 8502A.
e. The Scope display should be the same as Step 2.
4. Disconnect the terminated coaxial cable from both the 8502A and the Scope.
B. Sync Output.
1. Connect a coaxial cable (no termination) from the SYNC output on the back of the PPM to the
Scope.
2. The Scope display should be similar to Figure 5-7.
-0.8V
-1.8V
20 ns
Figure 5-7. Typical PPM Sync Output Scope Display
3. Disconnect the coaxial cable from both the PPM and the Scope.
C. Frequency Input.
1. Connect a coaxial cable from the voltage source to the FREQUENCY INPUT connection on the
back of the PPM.
2. Set the voltage source to +5.000V.
3. Select the External Frequency input by pressing [MENU] (3) [F3] [F2] [UNITS] [UNITS] [GHz]
Manual No. 20790, Rev C, November 1998 5-19
Superceded by Revision D, March 2009