4-1
RF-5800H 150-WATT COMMUNICATION SYSTEM
FUNCTIONAL DESCRIPTION
CHAPTER 4
FUNCTIONAL DESCRIPTION
4.1 INTRODUCTION
This chapter covers the functional description of the RF-5800H 150-Watt Communication System. Refer to
Chapter 6 for Built-In Test (BIT) and system troubleshooting information. The major function level description is
divided into the following three signal paths:
• Radio Frequency (RF)/Audio Signal Path
• Control Path
• Power Distribution
The description of each signal type is further divided as each unit relates to the signal path. Each signal type is not
present on every unit in the system, which will be apparent in the following paragraphs.
NOTE
For information on how to repair the Receiver/Transmitter
(R/T) or Power Amplifier (PA) units, refer to the Level III
RF-5800H-MP and RF-5833H-PA Intermediate Maintenance
Manuals.
4.2 SIGNAL PATHS
4.2.1 RF/Audio Signal Path
See Figure 4-1. The RF/Audio signal path begins at the handset connected to J7 of the RF-5833H-PA. The audio
leaves the RF-5833H-PA at J6 and is routed to J1 of the RF-5800H-MP via the R/T-PA Audio Cable Assembly. The
RF-5800H-MP converts the audio signal at J1 into RF and sends the RF from J7. From J7, the RF is routed via the
R/T-PA Coaxial Cable Assembly to J1 of the RF-5833H-PA. The RF signal is amplified to 150 watts by the
RF-5833H-PA for frequencies between 1.6 MHz and 29.9999 MHz or 60 Watts for frequencies between 30 MHz
and 59.9999 MHz. The RF signal is then sent either from J8 to a Very High Frequency (VHF) antenna (30-59.9999
MHz) or from J11 for the HF antenna (1.6-29.9999 MHz). For system configurations that contain the 25 MHz
Lowpass Filter (LPF), the signal is routed to the IN connector on the LPF before being passed to either an HF
antenna or the optional RF-382A Antenna Coupler. If the optional RF-382A is used the 1.6 to 29.9999 MHz RF
signal is routed from J11 on the RF-5833H-PA (or the OUT connector on the LPF) to J1 of the RF-382A. The receive
path is identical, except in the reverse. There is also a front panel speaker on the RF-5833H-PA that can be used to
monitor the receive audio.
4.2.2 Control Path
See Figure 4-1. Control signals from the RF-5800H-MP are routed from J6 via the R/T-PA Control Cable Assembly
to J2 of the RF-5833H-PA. Coupler control signals are sent from J9 of the RF-5833H-PA to J2 of the RF-382A (if
used) via the PA-Coupler Control Cable Assembly.
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