Cross Technologies 1599-10, Инструкция по эксплуатации

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2.5 Installation / Operation -
2.5.1 Local Operation -
1.) Check that on-card jumpers are set to the desired positions (Figure 2.4)
2.) Install the 1599-10 in any slot of a 1602 or 1601 mainframe (Figure 2.1 shows installation in slot 1)
3.) Connect a -20.0 dBm 70 MHz signal to
70 MHz SIGNAL IN
(Figure 2.1, Figure 2.3)
4.) Set the desired noise level by pushing SW2 or SW3. If numbers 0 to 9 appear when pushing SW2 or
SW3,
the 1599-10 is set for the preset level mode (with on-card jumper JP7, Figure 2.4).
See section 2.5.2 for noise level setting information.
5.) Be sure DS1 and DS5 are off (Figure 2.2).
8.) If needed, R48 can be adjusted (Figure 2.2) to SLIGHTLY adjust the noise level.
Note that this uncalibrates the 1599-10 from its factory calibration.
2.5.2 Noise Level Setting, Continuous Level Mode - In this mode, the noise level is selected by pushing the
up and down switches (SW2, SW3) on the front panel until the desired noise level is indicated on the front on the
display. The noise level displayed is either C/No based on a -20.0 dBm carrier input or attenuation from the
maximum 50 dB-Hz C/No noise level Note that in the 40 MHz filter setting, the maximum allowable noise level
corresponds to a 60 dB-Hz C/No and setting the the noise level higher causes the display to blink indicating an
abnormal condition. EEROM U20 stores the last noise level set so in the event of power failure the 1599-10 will
go to the noise level it was set to prior to the power outage. The front panel noise level setting switches increment
or decrement the noise level in 0.1 dB steps at approximately a 0.5 second rate. If the switch remains depressed
for approximately ten steps, the rate increases by a factor of ten.
1599-10 Manual, Rev. A Page 6 01/07/10