General - IFR FM/AM-1200A Operation Manual

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5-9
DIGITAL VOLTMETER AND DTMF DECODER - OPTION 10 (FM/AM1200A ONLY)
[Nc;?TE]
The Digital Voltmeter is standard equipment for
FM/AM-12005 units Serial Number 9267 and on.
5-9-1 GENERAL
The Digital Voltmeter and the DTMF Decoder are only functional if the
optional DVM I/0 PC Board (Option 10) is installed.
5-9-2 DIGITAL VOLTMETER OPERATION
18
22
CONTROL
FM/AM-1200S/A CONNECTORS
AND INDICATORS APPLICABLE
TO DIGITAL VOLTMETER
OPERATION:
20
37
SCOPE/DVM Connector
VFD
Figure 5-2 FM/AM-1200S/A Front Panel Controls
Applicable to Digital Voltmeter
Operation
SETTING
Keyboard
PWR/OFF/BATT Switch
As req'd
"PWR" or "BATT"
Table 5-2 FM/AM-1200S/A Front Panel Controls
Applicable to Digital Voltmeter
Operation
Table 5-1 lists the FM/AM-1200S/A front panel controls applicable to
the Digital Voltmeter function. The Digital Voltmeter is capable of
measuring AC or DC voltages up to a maximum of 100 volts. The VFD (37)
displays the measured voltage.
The scale displayed on the VFD (37) is
auto-ranging, depending on the voltage input.
5-4
06