Doc No 93-0491-4
UNCONTROLLED COPY ONCE PRINTED
PAGE 16 OF 21
Then select remote station F0
Connect the power to the TDC fixed delay meter, +12V, 0V and -12V and power up. The fixed delay meter
should already be on F0, if not, use the ▲ and ▼ arrow keys till the display states 0: 9200 MHz
There will be fixed delay value written on the display of approx. 489nS (this is the target value across F0, F1,
F2 and F3)
Make sure that the returned signal level across all frequencies is set at -48dB. To do this select the remote
station F0, check the signal level, Select F1 remote station and press the arrow keys on the TDC Fixed delay
meter till you see 1: 9300MHz. Then you get a timing written on screen (that’s when you know it is connected)
Check the signal level… Do this for all four frequencies. Any adjustment required to be carried out can be
done by turning the adjustable attenuator pot on the TDC Fixed delay meter.
Once you have -48dB across all frequencies look at the time delay on the TDC Fixed delay meter. There are
two adjustment parameters in the ASI software to set-
up the delay time, ‘fdll’ and ‘fdls’. ‘fdll’ is a course
adjustment and ‘fdls’ is a fine adjustment. The likelihood is that only the ‘fdls’ will require adjustment to get the
correct time delay.
