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SECTION 2
INSTALLATION
2.1 GENERAL
This section contains information on the installation and initial checkout of the Model
F22XX modems. Paragraph 2.2 contains general information on site selection and mounting.
Paragraphs 2.3 through 2.6 contain detailed instructions for connecting F22XX modems and
selecting the available options. Paragraph 2.7 contains initial checkout procedures.
2.2 SITE SELECTION AND MOUNTING
The Model F22XX modems are designed to connect directly to the serial port (DB25
Connector) of terminal equipment with a customer-supplied cable. Mounting options include
single card (HF-1) standalone enclosures and 2-slot (HF-2SS) or 20-slot (HF-20A) rack mount
chassis.
2.3 POWER
REQUIREMENTS
Model F22XX modems operate from an AC power source or a DC power source with a DC
voltage of +12 VDC, 1.5A. The power supplies used when installed in a HF-1 enclosure or HF-
2SS chassis are VERSITRON Model PSAC15 (US) pro12 VDC, 1.5A or PSAC09
(European) pro12 VDC, 1A. Connect the power adapter to the F22XX modem before
inserting its plug into an AC power source. No special tools are required. DC power may be
used instead of an AC adapter, if available. This requires a 2.5 mm socket with positive on the
center and common on the concentric, and pro12 VDC, 1.5A. When modem
installations utilize the Model HF-20A 20-slot chassis the AC300WR Power Supply / System
Monitor is used to provide power to all modems installed. The AC300WR is designed with
power redundancy and requires one unit of rack space above the HF-20A.
2.4 SWITCH
SETTINGS
2.4.1 Polarity Straps
The input/output polarity straps should be set as specified in Table 2. The locations of the
jumpers and test points on the F22XX circuit board are shown in Figure 3.
I/O
JUMPER
NONINVERTED
(TRUE) POLARITY
INVERTED
POLARITY
CH. 1 (TX DATA) INPUT
JP6
A: 3-4, B: 1-2
A: 1-3, B: 2-4
CH. 2 (TX CLOCK) INPUT
JP8
A: 3-4, B: 1-2
A: 1-3, B: 2-4
DTR INPUT
JP10
A: 3-4, B: 1-2
A: 1-3, B: 2-4
CH. 1 (RX DATA) OUTPUT
JP4
2-3
1-2
CH. 2 (RX CLOCK) OUTPUT
JP5
2-3
1-2
DCD/DSR OUTPUT
JP2
1-2
2-3
LOOPBACK CIRCUIT
JP12
OPEN - ENABLED
1-2 - DISABLED
TABLE 2. F22XX MODEM JUMPER SETTINGS
