Mainframe clock adjustment
Procedure
Perform the fol
lowing procedure to adjust the master clock frequency using
a frequency standard.
1. Set the output
of the frequency standard as follows:
Frequency: 10.000000 MHz
Output leve
l: 8 dBm
2. Use the 75 Ω BNC cable to connect the CW connector on the AGL7 Genlock
module to th
e output of the frequency standard as shown in the following
figure.
NOTE. You can use a Tektronix TG700 or TG8000 signal generator with a GPS7
module installed to produce the 10 MHz frequency standard.
In this case, ensure that the GPS7 module is locked to a GPS signal in fine mode.
Configure the Black 3 output of the GPS7 module to output a 10 MHz sine wave.
Connect the GPS7 module Black 3 output to the CW input on the AGL7 module of
the T G8000 you are testing.
Figure 2-1: Equipment connection f or adjusting the master clock frequency using a frequency standard
3. Restart the instrument in Factory mode:
a. Press and hold the MODULE, ENTER,andFront Panel ENABLE
buttons simultaneously.
b. Continue holding the buttons until the message TG8000 Booting...
displays.
c. When the message TG8000 Booting... displays, release the MODULE
and ENTER buttons. Continue holding the Front Panel ENABLE
button.
d. When the message TG8000 Start up with Factory Mode displays,
release the Front Panel ENABLE button.
4. Let the instrument warm up for 20 minutes before proceeding.
TG8000 Multiformat Test Signal Generator Service Manual 2–3
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