HP 4935A, Руководство по эксплуатации и обслуживанию

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Operation
3-9.
MEASUREMENTS
LEVEL AND FREQUENCY-TRANSMITTER
a. Use key to select LEVEL FREQUENCY.
Press key to display the transmitted signal. TRMT light is ON.
can be read in left display and frequency in the right.
c. If SF signalling units are used on the circuit under test, press SF SKIP key to turn on SF
SKIP. When the light is on the transmitter is blanked from 2450 Hz to 2750 Hz or
Hz around a stored SF SKIP frequency.
SF SKIP frequency is preset at 2600 (Skip will be 2600 Hz 150 Hz). The SF SKIP
center frequency can be changed by putting the desired skip frequency into the
transmitted frequency display. Then press the
key and the SF SKIP key. He sure
to disconnect the transmit side of line from the test set first to avoid dropping the
circuit during the storage procedure.
d.
Turn OUTPUT knob to adjust level of the transmitted signal to
is usually below the transmission level point A +
indicates the level is A sign indicates the level is -40
Use the STEP UP and STEP DOWN keys to set the desired frequency or press F2, F3
or F4 to recall any stored frequency. Holding a finger on either the STEP UP or STEP
DOWN keys causes the transmitter to sweep.
STORE and Frequencies. There are 4 frequencies stored in locations
and F4 when the is turned on. is 404 Hz, is 1004 Hz, is 2804 Hz and F4 is
271 Hz. To store other frequencies set the desired frequency in the transmitted frequency
display, press the STORE key and press whichever location key,
or F4 that is
desired as the storage location.
Figure 3-2. Measurements (Continued)