Honeywell JetWave MCS-8562 Installation And Maintenance Manual page 57

SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
(3) The Modman bonding is as follows:
The Modman must be electrically bonded to the airframe. Make sure that the mating
surfaces are free from contaminants such as paints or other non-conductive elements. A
bonding test point is available on the front panel. The bonding resistance must be less
than or equal to 2.5 mΩ.
(4) The TX and RX IF cables between the Modman and BUC-HPA must meet the
recommended insertion loss. Refer to Table 3-3. The allowed insertion loss should account
for any optional IF switch components.
NOTE:
Table 3-3. Insertion Loss Between Modman and BUC-HPA
Insertion Loss at 50
MHz Insertion Loss at 950 MHz
Loss in TX path must Minimum loss of 11 dB
be less than 3.1 dB
NOTE:
(5) If the loss in the chosen cable is too small, an equalizer or attenuator should be inserted
in the IF path. The choice of parts is detailed in Table 3-4.
NOTE:
EFFECTIVITY
ALL
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JetWave™ MCS-8562 Terminal
The VSWR specification is for the cables, and not for the total VSWR of the
installation.
Insertion Loss at 1,450
MHz
TX and RX cable loss
must be matched within
1 dB
Maximum loss of 18 dB
The isolation specification may need to be increased if the TX and RX cables
are in close proximity to high power RF signals in the 950 MHz to 1,950 MHz
band, e.g. cellular base stations.
An attenuator cannot be used in the TX path as the TX path also passes the
reference to the BUC-HPA and the attenuator will introduce too much loss to
that portion of the signal.
23-15-84
Insertion Loss at 1,950 MHz
TX and RX coax cables should
be 50 ohms with a VSWR of
less than 1.5:1
Maximum loss of 21.2 dB
NOTE: TX and RX cables
must have a
minimum isolation
of 100 dB
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11 Nov 2020