Measurements; Level And Frequency-Transmitter - HP 4935A Operating And Service Manual

MEASUREMENTS

3-9.
LEVEL AND FREQUENCY-TRANSMITTER
a. Use MEAS key to select LEVEL FREQUENCY.
Press I)ISPLAY-TKMT key to display the transmitted signal. TRMT light is ON. I,rvel
can be read in the 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 ?150
Hz around a stored SF SKIP frequency.
SF SKIP frequency is preset at 2600 IIz (Skip will be 2600 Hz -t 150 Hz). The SF SKIP
center frequency can be changed by putting the desired skip frequency into the
transmitted frequency display. Then press the STORE: key and the SF SKIP key. He sure
to disconnect the transmit side of the line from the test set first to avoid dropping the
circuit during the storage procedure.
Turn OUTPUT 1,EVEL knob to adjust the level of the transmitted signal to I)ATA
d.
Use the STEP UP and STEP DOWN keys to set the desired frequency or press Fl, 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 KECALI, Frequencies. There are 4 frequencies stored in locations Fl, F2, F3
and F4 when the 49315A is turned on. Fl is 404 Hz, F2 is 1004 Hz, F3 is 2804 Hz and F4 is
271 X Hz. To store other frequencies set the desired frequency in the transmitted frequency
display, press the STORE key and press whichever location key, Fl, F2, F:%, or F4 that is
desired as the storage location.
Figure 3-2. Measurements (Continued)
Operation