HP 8901B Operation And Calibration Manual page 57

Operation Model 8901B
Front-Panel Features
The following list provides a brief description of each feature. The information in brackets provides
the title of the Detailed Operating Instructions relevant to the feature. The index lists page numbers
for the instructions.
1.
MEASUREMENT keys enable the Modulation Analyzer to make and display the selected
measurement. [See AM, FM,
@M,
RF Power, RF Input FYequency, Audio FYequency, Audio
Distortion, IF Level, Tuned RF Level, RF FYequency Error.]
2. Numeric Display shows measurement results, error codes, or instrument or Special Function
status.
3. Display Annunciators indicate the measurement result units. They also indicate that some
measurement functions are enabled. All these annunciators are displayed when the Modulation
Analyzer is first turned on.
4.
AUTOMATIC OPERATION enables the Modulation Analyzer to automatically tune and to
autorange to make the selected measurement. [See Automatic Operation.]
5 . INSTR PRESET (Blue Key) configures the Modulation Analyzer to its power-up condition. [See
Instrument Preset.]
6. TRACK
MODE
and
AUTO
TUNING (Blue Key) select the tuning mode of the Modulation
Analyzer. [See
RF
FYequency Tuning.]
7.
STORE (Blue Key) and RECALL (Blue Key) enable the Modulation Analyzer to store and recall
up to eight measurement states. [See Store/Recall.]
8. WATTS, pV, mV, and VOLTS keys (all used with the Blue Key) enable selection of different
units
for
level measurements.
9. MHz completes the keyboard entry of frequencies for various functions. This key is also used
to complete the entry of frequencies used with RF Power calibration factors. [See RF FYequency
nning, FYequency Offset Mode,
RF
Power.]
10. MODULATION OUTPUT/AUDIO INPUT connector provides either an output for the mod-
ulation recovered from the RF INPUT connector or an input for external audio signals to be
processed by the audio circuitry. The MODULATION OUTPUT annunciators indicate the type
of recovered modulation available as the output. The AUDIO INPUT key selects whether the
internally demodulated signal or an external audio signal is to be processed by the Modulation
Analyzer's audio circuitry. [See Modulation OutputlAudio Input, Audio FYequency, Audio
Distortion and Level, SINAD.]
11. 7% CAL FACTOR (Blue Key) causes the Modulation Analyzer to display the current calibration
factor for the selected measurement. This key is also used to complete the entry of calibration
factors for various functions. [See AM Calibration, FM Calibration, RF Power.]
it tuned to last. [See FFequency Offset Mode, RF Power Calibration Factors.]
12.
DISPLAY FREQ (Blue Key) causes the Modulation Analyzer to display the RF frequency that
'
13. SENSOR connector provides the input for the power sensor. [See RF Power.]
14.
kHz
0
and kHz
4
complete keyboard entry of frequency step-size (in kHz) for step tuning, or
change the frequency in the increments specified. [See RF FYequency Tuning.]
15. DISPLAY FREQ INCR (Blue Key) causes the Modulation Analyzer to display the increment
step-size. [See RF Frequency Tuning.]
16. INPUT couples the RF input signal into the instrument. [See RF Input Requency.]
17. SPCL completes entry of Special Function codes that access additional instrument operations.
Without a preceeding numeric entry, the SPCL key causes a display of the status of Special
Functions
1
through
10.
[See Special finctions.]
3-6