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Model 8902A
Operation
15. Time Base Check. Use this special function to check the status of the time base being used by
the Measuring Receiver. (More information about the time base is on page
3-3.)
15.0
Display whether the internal, Option
002
time base oven is warm enough to create a stable
15.1
Display whether the internal or external time base is being used; 0 = internal and
source; 0
=
warm. Error
12
is displayed if the time base is cold.
1 =
external.
16. AM Calibration Factor. This special function enables you to disable, enable, or display the
current AM calibration factor. Front-panel keys SAVE CAL (Blue Key, CALIBRATE) and
%
CAL
FACTOR (Blue Key, MHz) can also be used to enable and display the calibration factor. (For a
complete procedure for AM calibration, refer to AM Calibration on page
3-167.)
16.0
Disable the AM calibration factor.
16.1
Enable the AM calibration factor.
16.2
Display the AM calibration factor. (Displays 0 if not enabled.)
17.
FM
Calibration Factor. This special fiinction enables you to disable, enable, or display the
current FM calibration factor. Front-panel keys SAVE CAL (Blue Key, CALIBRATE) and
Y o
CAL
FACTOR (Blue Key, MHz) can also be used to enable and display the calibration factor. (For a
complete procedure for FM calibration, refer to
FM
Calibration on page 3-181.)
17.0
Disable the FM calibration factor.
17.1
Enable the FM calibration factor.
17.2
Display the FM calibration factor. (Displays 0 if not enabled.)
18."
Tone Burst Receiver. Use this special function to measure the frequency of squelch tones.
A time delay of
N N
ms is inserted between detection of a carrier and unsquelching of the output at
the MODULATION OUTPUT connector. The range of NN is
1
to
99
ms. If NN is 0, the delay is
99 ms. (Refer to Tone Birrst R m + w o n page
3-193
for more information about this function.)
21. HP-IB Address. Use this special function to display the HP-IB address in the form:
AAAAAAA.TLS., where:
AAAAAAA is the address in binary,
T
=
1
=
talk only,
L
= 1 =
listen only, and
S
=
1
=
requesting service.
22. Service Request. Use this special function to set up a service request mask. A value of NN
from 0 to
63
sums the weighted conditions below to set
up
a service request mask. The summed,
weighted conditions are displayed when N N is 64. Refer to page
3-30 for
more information about
this service request mask.
1
Data ready
2 HP-IB error (cannot be disabled)
4
Instrument error
8 Limit exceeded
16
Frequency Offset mode state change
32
RECAL or UNCAL
64 read back SRQ mask
rev.ltiJUNE86
3-279
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