Ten-Tec RX-400A User manual

USER MANUAL
INSTALLATION AND OPERATION
HF/VHF/UHF DSP RECEIVER
MODEL RX-400A
TEN-TEC, INC.
1185 DOLLY PARTON PARKWAY
SEVIERVILLE, TN 7862
THIS MANUAL WAS PREPARED IN ACCORDANCE WITH MIL-HDBK-1221
1ST PRINTING – /10
PRINTED IN U.S.A.
PART NO. 74446

RECORD OF CHANGES
CHANGE NO. DATE TITLE OR DESCRIPTION ENTERED BY
001 7/26/10 para 4.3, page 4-1, add Mission J. Andem
Download feat re notation
002 7/27/10 para 5.2.5, page 5-5, add AGC mode J. Andem
description
003 7/27/10 para 7.6.1, page 7-22, add Mission J. Andem
Download command word listing
P/N 74446

WARNING
HIGH VOLTAGE
Is used in the perati n f this equipment.
DEATH ON CONTACT
may result if pers nnel fail t bserve safety precauti ns.
Learn the areas c ntaining high v ltage within the equipment.
Be careful n t t c ntact high v ltage c nnecti ns when installing,
perating r maintaining this equipment.
Bef re w rking inside the equipment, turn p wer OFF and
gr und p ints f high p tential bef re t uching them.
P/N 74446

TABLE OF CONTENTS
PARAGRAPH PAGE
LIST OF ILLUSTRATIONS……………………………………………………….. iii
LIST OF TABLES…………………………………………………………………… iv
1.0 INTRODUCTION
1.1 Purp se, Sc pe and C ntent………………………………………………………….. 1-1
2.0 GENERAL INFORMATION
2.1 RX-400A Purp se and Functi n………………………………………………………… 2-1
2.2 Specificati ns……………………………………………………………………………….. 2-4
2.3 Envir nmental C nditi ns………………………………………………………………. 2-6
2.4 Mechanical……………………………………………………………………………………. 2-6
2.5 Electrical………………………………………………………………………………………. 2-8
.0 PREPARATION FOR USE AND INSTALLATION
3.1 Unpacking and Inspecti n……………………………………………………………… 3-1
3.2 M unting……………………………………………………………………………………… 3-1
3.3 P wer………………………………………………………………………………………….. 3-1
3.4 RF,IF, Ext. Reference and Audi C nnecti ns………………….………………. 3-2
3.5 Rem te C ntr l C nnecti ns………………………………………………………….. 3-2
3.6 C nnecti n t RCU-400A Receiver C ntr l Unit………………………………… 3-2
3.7 C nfigurati n Dip Switch……………………………………………………………….. 3-5
3.8 Fuse…………………………………………………………………………………………….. 3-5
3.9 Fr nt Panel C ntr ls………………………………………………………………………. 3-5
3.10 Headph nes Jack…………………………………………………………………………… 3-5
3.11 Fr nt Panel Indicat rs……………………………………………………………………. 3-5
3.12 C ling Fan…………………………………………………………………………………… 3-5
3.13 Chassis Gr und……………………………………………………………………………… 3-5
4.0 OPERATION
4.1 P wer ON/OFF………………………………………………………………………………. 4-1
4.2 Headph nes V lume………………………………………………………………………. 4-1
4.3 Status Indicat rs……………………………………………………………………………. 4-1
PN 74446
i

TABLE OF CONTENTS, cont’d
PARAGRAPH PAGE
5.0 THEORY OF OPERATION
5.1 Overview…………………………………………………………………………………….. 5-1
5.2 Circuit Descripti ns………………………………………………………………………. 5-2
5.2.1 L w Band Preselect r…………………………………………………………. 5-2
5.2.2 Mid Band Preselect r………………………………………………………….. 5-3
5.2.3 First C nverter……………………………………………………………………. 5-3
5.2.4 Sec nd C nverter……………………………………………………………….. 5-3
5.2.5 Third C nverter…………………………………………………………………… 5-4
5.2.6 First L cal Oscillat r……………………………………………………………. 5-5
5.2.7 Sec nd L cal Oscillat r……………………………………………………….. 5-6
5.2.8 Third L cal Oscillat r………………………………………………………….. 5-6
5.2.9 L gic/DSP Secti n………………………………………………………………. 5-7
5.2.10 P wer Supply……………………………………………………………………… 5-7
6.0 FIRMWARE LOAD AND UPDATE PROCEDURES
6.1 Intr ducti n…………………………………………………………………………………. 6-1
6.2 Required Applicati n T ls…………………………………………………………….. 6-1
6.3 Firmware L ad/Update Steps…………………………………………………………. 6-1
7.0 RECEIVER REMOTE CONTROL
7.1 Intr ducti n…………………………………………………………………………………. 7-1
7.2 Serial Interface Descripti n……………………………………………………………. 7-1
7.2.1 C mmunicati ns Pr t c ls……………………………………………………. 7-1
7.3 C mmand Message F rmatting………………………………………………………. 7-2
7.4 Terminat rs f r C mmands and Queries………………………………………….. 7-2
7.5 Query Resp nse F rmats……………………………………………………………….. 7-3
7.6 C ntr l Parameters……………………………………………………………………….. 7-3
7.6.1 C mmand Descripti ns………………………………………………………… 7-5
8.0 AUDIO STREAMING
8.1 Radi Over IP (RIP) Data F rmat……………………………………………………. 8-1
9.0 MAINTENANCE
9.1 Fact ry Service……………………………………………………………………………… 9-1
9.2 Cleaning and Lubricati n……………………………………………………………….. 9-1
9.3 Inspecti n…………………………………………………………………………………….. 9-2
9.4 Perf rmance Verificati n and Fault Is lati n…………………………………….. 9-2
9.5 Fan Speed…………………………………………………………………………………….. 9-2
10.0 PREPARATION FOR SHIPMENT OR STORAGE
10.1 St rage…………………………………………………………………………………………. 10-1
10.2 Shipment………………………………………………………………………………………. 10-1
ii PN 74446

LIST OF ILLUSTRATIONS
FIGURE PAGE
2-1 RX-400A Fr nt View 2-1
2-2 RX-400A Rear View 2-2
2-3 RX-400A/RCU-400A Rack Assembly, Fr nt View 2-3
2-4 RX-400A/RCU-400A Rack Assembly, Rear View 2-3
2-5 RX-400A Receiver 3-View Drawing 2-7
2-6 RX-400A Electrical Bl ck Diagram 2-8
3-1 RX-400A/RCU Installati n Drawing 3-3
5-1 RX-400A Functi nal Bl ck Diagram 5-1
9-1 C ling Fan Filter Rem val 9-1
iii PN 74446

LIST OF TABLES
TABLE PAGE
2-1 RX-400A Specificati ns 2-4
2-2 Envir nmental C nditi ns 2-6
2-3 Receiver P wer Requirements 2-8
3-1 Rack M unt Kit C ntents 3-1
3-2 RX-400A Audi C nnecti ns 3-4
7-1 Baud Rate Settings 7-1
7-2 C mmand Parameters 7-3
iv PN 74446

CHAPTER 1
1.0 INTRODUCTION
1.1 PURPOSE, SCOPE AND CONTENT OF USER MANUAL
This manual pr vides installati n and perati n instructi ns as well as pertinent technical data
f r the RX-400A HF/VHF/UHF DSP Receiver. The manual was prepared using MIL-STD-1221,
Department f Defense Handb k f r Evaluati n f C mmercial Off-The-Shelf (COTS) Manuals
as a guideline. It is rganized int Chapters al ng with a Table f c ntents, List f Illustrati ns,
and List f Tables.
Chapter 2 presents general inf rmati n ab ut the RX-400A Receiver including functi nal
capabilities, perf rmance specificati ns and physical characteristics.
Chapter 3 pr vides inf rmati n c ncerning the unpacking, inspecti n and m unting f the
Receiver. This chapter als pr vides instructi ns f r making c nnecti ns t the Receiver as well
as identifying the use and l cati n f chassis m unted c mp nents.
Chapter 4 pr vides detailed descripti ns f all the fr nt panel perating c ntr ls, rear panel
c nfigurati n switch and purp se f fr nt panel status indicat rs.
Chapter 5 pr vides a brief the ry f perati n t pr vide the User with a w rking kn wledge f
the Receiver.
Chapter 6 c ntains the inf rmati n and steps required t initially l ad r update the Receiver
Firmware.
Chapter 7 Pr vides the User and System Manager with the data necessary t effect rem te
c ntr l f the Receiver t include interface descripti n, message f rmatting and c mmand
descripti ns.
Chapter 8 describes the Audi Streaming functi n.
Chapter 9 pr vides maintenance inf rmati n.
Chapter 10 gives instructi ns t prepare the Receiver f r st rage r shipment
1-1 PN 74446

CHAPTER 2
2.0 GENERAL INFORMATION
2.1 RX-400A RECEIVER PURPOSE AND FUNCTION
The TEN-TEC RX-400A is an all m de, wide RF c verage, HF/VHF/UHF receiver that
delivers military-grade perf rmance in a C mmercial-Off-The-Shelf (COTS) pr duct. The
unit is designed t pr vide signal acquisiti n, m nit ring and c llecti n functi ns using
manual tuning, frequency scan r directed search mem ry channel m des f perati n.
The RX-400A c vers the frequency range f 100kHz t 3000 MHz using a mix f high
perf rmance anal g circuitry f r the RF t IF c nversi n path c upled t a digital back-
end c mprised f the latest digitizer and DSP techniques t pr vide a s ftware defined
receiver. The DSP secti n pr vides 27 digital IF filters fr m 100Hz t 300kHz and AM,
FM, USB, LSB and CW detecti n m des. Other than a p wer ON/OFF switch,
headph ne jacks, v lume c ntr l and status indicat rs, the receiver has a blank fr nt
panel, thus is designed f r rem te c ntr l perati n. Rem te c ntr l is via a
c mpani n RCU-400A Receiver C ntr l Unit r via a h st/PC using an pti nal Graphical
User Interface (GUI) s ftware package.
Figure 2-1 RX-400A, Fr nt View
All interface t the Receiver is via rear panel c nnect rs f r p wer, RF input, IF utputs,
line audi utput, external reference input and rem te c ntr l. The rear panel als
c ntains a dip-switch t set the receiver c nfigurati n t perati nal r firmware update
m des.
2-1 PN 74446

Figure 2-2 RX-400A, Rear Panel View
The RX-400A c ntains separate signal paths f r HF and VHF/UHF frequency bands. The
HF secti n c vers the 100kHz t 88 MHz range. The VHF/UHF fr nt-end c vers the
range fr m 88 MHz t 3000 MHz. A single RF input c nnect r is used t c ver b th
ranges. Internal firmware c mmands aut matically switch between the HF and
VHF/UHF pre-select r secti ns based n tuned frequency.
During HF perati n signals entering the HF c nverter secti n first pass thr ugh a user
adjustable step attenuat r t enhance receiver perf rmance by reducing interference
caused by receive verl ad in the presence f extremely large signal levels enc untered
in the HF frequency d main. The attenuat r is f ll wed by multiple p le RF filters (pre-
select r) t eliminate p tential interference fr m ut- f-band signals.
F r VHF/UHF perati n the received signals are r uted t the high band pre-select r
which c ntains switched filter sets t c ver sub- ctave ranges between 88 and 3000
MHz. F r ther than U.S. G vernment, U.S. Military r appr ved f reign g vernment
use the RX-400A will n t pr vide c verage f the vari us cellular teleph ne bands.
The 2 Receiver IF utputs, WBIF 1 and WBIF 2, pr vide wideband IF signals f r use
with auxiliary analysis equipment such as IF pan signal m nit rs and IF-Tape
c nverters. The IF center frequency is 21.4 MHz with a bandwidth f 2 MHz bel w a
tuned frequency f 20 MHz. Fr m a tuned frequency f 20 t 3000 MHz the IF
bandwidth is 6 MHz.
2-2 PN 74446

The RX-400A c ntains tw (2) c mmand and c ntr l p rts, an Ethernet IP RJ-45
c nnect r, and a standard USB c nnect r. B th interfaces supp rt the same c mmand
set, with the excepti n f the digital audi streaming which is nly available n the
Ethernet IP interface. Generally the USB interface is used as the firmware update p rt
r f r c nnecti n t an external h st PC f r receiver c ntr l using the pti nal GUI
package, while the Ethernet interface is used f r c nnecti n t the RCU-400A Receiver
C ntr l Unit, f r c ntr l/status and audi streaming. This p rt can als be used f r
c nnecti n directly t a h st PC with the added benefit f audi streaming capability,
pr viding the h st has the pti nal GUI s ftware installed.
Internal RX-400A receiver firmware establishes the perating features and parameters
such as tuned frequency, gain, AGC m de, IF filter bandwidth, detecti n m de, BFO
and all the functi ns ass ciated with frequency and mem ry channel scan m des. This
firmware can be updated in the field using a lapt p c mputer r the system h st
PC/w rkstati n with the appr priate drivers. See Chapter 6 f r details.
Figure 2-3
RX-400A Receiver M unted Side-By-Side with RCU-400A Receiver C ntr l Unit
Fr nt View
Figure 2-4
RX-400A Receiver M unted Side-By-Side with RCU-400A Receiver C ntr l Unit
Rear View
2-3 PN 74446

2.2 SPECIFICATIONS
TABLE 2-1
Parameter Perf rmance
Frequency Range……………………………….100 kHz t 3000 MHz
Tuning Res luti n………………………………1 Hz steps (10kHz steps at WB IF utput)
Operating M des……………………………… Manual Tune,F1-F2 Scan and Mem ry
Channel directed search
Detecti n M des………………………………..AM, FM, USB, LSB and CW
Frequency Stability…………………………….TCXO, +/-20Hz bel w 30 MHz,
+/- 0.5ppm ab ve 30 MHz
Frequency Accuracy…………………………..All scillat rs l cked t int./ext. reference
External Reference…………………………….1,2,5 r 10 MHz @ -10dBm n minal,
receiver aut matically switches t this
reference up n applicati n
Spuri us Resp nses…………………………..All spuri us less than –105 dBm, equivalent
input max., except with appr x. 6 spurs @ less
than –80 dBm
Image Rejecti n………………………………..80 dB typical, 2-3000 MHz
IF Rejecti n………………………………………80 dB typical, 2-3000 MHz
BFO…………………………………………………Tunable in CW m de nly, +/- 8 kHz in 10 Hz
steps, fixed ffset in USB/LSB m des, disabled
in AM, FM m des
Mem ry Channels…………………………….1000 each, full receiver parameter set-up
Scan Rate………………………………………..100 channels per sec nd r faster, adjustable
Gaze, Dwell and Dead times
Synthesizer L ck Time………………………. Appr ximately 1 millesec nd
Squelch……………………………………………Adjustable, 0-127 dB
Selectivity………………………………………..Std. 27 IF bandwidth set, 100 Hz t 300 kHz,
independent f detecti n m de, 1.5:1 shape
fact r r better, DSP derived, 3 dB ripple, max.
Sensitivity………………………………………..M de S/N BW dBm
USB/LSB 10 dB 3 kHz -117
AM (50%) 10 dB 6 kHz -108
FM-NB 16 dB 15 kHz -107
FM-WB 16 dB 50 kHz -102
FM-WB 16 dB 200 kHz -96
Dynamic Range………………………………. Freq. NF(typ) In-band IIP (typ)
2-88 MHz 12 dB -2 dBm
89-1650 MHz 13 dB -3 dBm
1651-3000 MHz 14 dB -3 dBm
2nd Order Intercept P int………………….50 dBm, minimum
2-4 PN 74446

TABLE 2-1, C nt’d
SPECIFICATIONS
Parameter Perf rmance
AGC…………………………………………………..Fast, Medium, Sl w & Pr grammable, Manual
Gain (MGC) setting pr vided in all 4 m des,
120 dB range, AGC DUMP in all 4 m des
M de Attack Hang Decay
Fast 0.8 dB/ms 0 1200 dB/Sec
Medium 0.8 dB/ms 0 100 dB/Sec
Sl w 0.8 dB/ms 0 25 dB/Sec
Pr g. .01-1.0 dB/ms .01-99.9 .01-99.9
Sec. dB/Sec.
Wideband IF Output…………………………..Anal g, 21.4 MHz CF, fixed gain, 6 MHz BW,
10 kHz tuning steps, 2 MHz BW bel w 20 MHz
receiver tuned frequency
S-Meter……………………………………………..Rep rts signal level t h st in dBm n request
C ntr l Interface(s)……………………………2, Ethernet TCP/IP (RJ-45), and USB, std. 2.0
Firmware…………………………………………..Can be updated rem tely int Flash ROM
Antenna (RF) Input…………………………….50 hms, unbalanced, SMA c nnect r, 2.5:1
VSWR max.
Line Audi Output(s)..…………………………2 each, 0 dBm, +/- 3 dBm, 600 hms, One
AC c upled, ne DC c upled, 15 pin-D
Headph ne(s) Output………………………….2 stere jacks, ne std ¼ inch, ne std. 1/8,
10 mW int 600 hms, fr nt panel v lume
c ntr l
BITE………………………………………………….Rep rts pass/fail status t h st n request
MTTR………………………………………………..Less than 30 minutes f r replacement f any
f 9 maj r sub-assemblies
PN 74446
2-5

2.3 ENVIRONMENTAL CONDITIONS
The RX-400A Receiver is a rugged design intended f r c mmercial, g vernment and
military applicati ns. The unit is specifically suitable f r fixed site, vehicle r shelterized
installati ns, shipb ard service and cabin-class turb -pr p/jet aircraft if appr priate
sh ck and vibrati n is lati n is pr vided. The RX-400A is a COTS pr duct and as such
is n t certified t MIL-STD-810 standards, h wever the unit is designed t meet sh ck
and vibrati n levels ass ciated with pr cedure 514 f r cabin-class aircraft envir nments.
With regard t RFI/EMI the RX-400A is designed t meet, alth ugh n t fact ry tested,
t MIL-STD-461F f r CE02, CE03, RS01, RS02 and RS03.
The RX-400A is designed t perate under the c nditi ns in Table 2-2.
TABLE 2-2
ENVIRONMENTAL CONDITIONS
Parameter Specificati n
Operating Temperature……………………………..0 t 50 degrees C, full specificati n
Operating Limits……………………………………….Functi nal, -10 t +60 degrees C
St rage Temperature………………………………..-40 t +85 degrees C
Humidity…………………………………………………..10-95%, with ut c ndensati n
Altitude…………………………………………………….+15,000 feet MSL, un-pressurized
2.4 MECHANICAL
The RX-400A Receiver is h used in a standard 2U high EIA half-rack chassis. It has a
behind the panel depth f 16.00 inches (407mm), excluding c nnect rs.
C nstructi n is all aluminum with wrapped c rners and a thick fr nt panel t
acc mm date rack m unting. T p and b tt m c vers are affixed using flat head
screws. 10-32 threaded inserts are installed in the chassis sides t acc mm date user
slides. The rear panel has a 10-32 threaded insert t accept a chassis gr und
c nnecti n. The chassis is chem.-treated t resist c rr si n and the fr nt panel is
painted gray with black silk screening.
The RX-400A weighs 10.25 lbs. (4.65 kG)
Figure 2-5 depicts a 3-view drawing f r the RX-400A Receiver.
2-6 PN 74446

FIGURE 2-5 RX-400A RECEIVER, 3-VIEW DRAWING
PN 74446
2-7

2.5 ELECTRICAL
P wer requirements f r the RX-400A are presented in Table 2-3.
TABLE 2-3
RX-400A POWER REQUIREMENTS
Parameter Specificati n
Line V ltage……………………………………………..90 t 264 VAC
Frequency………………………………………………..48-440 Hz, single phase
P wer C nsumpti n………………………………….36 Watts, n minal
P wer C nnect r.……………………………………..Circular MS type c nnect r, 3-pin, male
Spikes and N ise……………………………………….Designed t meet MIL-STD-704,
but n t tested at fact ry
P wer C nnecti n……………………………………..Pin-A, AC High; Pin-B, AC L w; Pin-C,
AC Gr und
FIGURE 2-6 RX-400A ELECTRICAL INTERFACE
2-8
PN 74446
.0 PREPARATION FOR USE AND INSTALLATION
RX-400A HF/VHF/UHF
RECEIVER
Phones 1
Phones 2
Stat s Indicators
Vol me Control
Power Switch
RF Inp t 100kHz-3000MHz
IF 1, 21.4 MHz
IF 2, 21.4 MHz
External Reference
Line A dio
90-260 VAC Power

3.1 UNPACKING AND INSPECTION
Examine the shipping cart n f r damage bef re unpacking the unit. If the cart n is
damaged, attempt t pen it in the presence f the shipping agent. If this is n t
p ssible then d cument r ph t graph the cart n damage f r a matter f rec rd. If
undamaged then retain the cart n and packing material f r future use.
Rem ve the packing material fr m the t p f the unit and lift the RX-400A Receiver free
f the cart n. Next rem ve the clear plastic bag fr m the unit. Inspect the unit f r
external damage with particular attenti n t dents r bent sheet metal. Als inspect
fr nt panel c mp nents and rear panel c nnect rs f r damage. If external damage is
evident then rem ve t p and b tt m c vers f the RX-400A Receiver by rem ving
multiple screws al ng the c ver edges, then inspect all the internal assemblies f r
damage such as cracked circuit cards r br ken r l se c mp nents. DO NOT
ATTEMPT TO OPERATE THE EQUIPMENT IF INTERNAL DAMAGE IS NOTED. Up n
finding any damage c ntact the shipping agent and c ntact the TEN-TEC fact ry t
arrange f r unit repair.
3.2 MOUNTING
The RX-400A may be m unted as a single unit r side-by-side with an ther 2U half-rack
piece f equipment in a standard EIA 19” rack encl sure. F r single unit rack
installati n please c ntact TEN-TEC t secure the c rrect rack m unt kit. F r m st
c mm n m unting arrangements the RX-400A will be installed side-by-side with
an ther RX-400A Receiver r c mpani n RCU-400A Receiver C ntr l Unit t fill a 2U
rack pening. Side-by-side m unting is acc mplished by using the RM-400-2 Rack
M unt Kit. The RX-400A has 3 threaded inserts n each side f the chassis t accept
10-32 x 0.50” l ng screws f r use with cust mer furnished chassis slides. The h le
pattern is c mpatible with J nathan m del 375QD r equivalent.
The rack m unt kit c ntains 4 pieces as listed in Table 3-1.
TABLE 3-1
RM-400-2 Rack M unt Kit C ntents
Item Descripti n Quantity
001 U-Channel Bracket 1
002 Fr nt Panel Center Bracket 1
003 Rack M unt Ears (R & L) 2
004 10-32, Hex Head Attachment Screws 12
3-1 PN 74446
T use the RM-400-2 rack m unt kit, first attach the U-channel bracket t the ‘inside’
side f ne f the chassis using the rear 2 m unting h les ut f the set f 3, with the
furnished screws. Then attach the fr nt panel bracket t the chassis with the flat side

t ward the fr nt panel surface. Next, p siti n the sec nd chassis s the U-channel and
fr nt panel brackets can be attached t the sec nd chassis. N w the 2 units are
secured t gether with ab ut a 2 inch gap between the chassis. Next attach the left
hand and right hand brackets (rack m unt ears) using the furnished screws. The ears
are attached using 2 threaded 10-32 inserts at the fr nt f the RX-400A chassis. Refer
t Figure 3-1 f r parts rientati n.
3.3 POWER
Ensure the P wer Switch is in the OFF p siti n n The RX-400A Receiver (left side f
switch depressed t ward fr nt panel). C nnect a cust mer furnished p wer cable with
a female MS-type 3-pin plug t the p wer c nnect r n the rear f the RX-400A. Pin
wiring f r the cable must be identical t that listed in Table 2-3. Next plug the ther
end f the cable int a 90-260 VAC, single phase p wer s urce.
3.4 RF, IF, EXTERNAL REFERENCE AND AUDIO CONNECTIONS
The RF (Antenna) c nnecti n is made t Receiver via a SMA c nnect r. B th WBIF
utputs are c nnected t external devices using SMA c nnect rs/cables. Likewise an
external reference signal can be c nnected with a SMA cable. Balanced Line Audi is
available n a rear panel 15-pin D c nnect r where c nnecti ns are made via a
cust mer furnished mating c nnect r and cable assembly. Pin assignments are listed in
Table 3-2.
3.5 REMOTE CONTROL CONNECTION
RX-400A Receiver c ntr l is via tw (2) interface c nnect rs n the rear panel. One is
a USB 2.0 interface using the standard USB type c nnect r. The ther is ETHERNET
using a RJ-45 type jack. Either interface can be used t c ntr l the receiver and the
c mmand sets are identical, h wever, nly the ETHERNET interface pr vides the digital
audi streaming capability. Please see Chapter 7 f r detailed inf rmati n f r c mmand
w rds.
3.6 CONNECTION TO THE RCU-400A RECEIVER CONTROL UNIT
F r perat r manual c ntr l f the Receiver it can be c nnected t a c mpani n RCU-
400A Receiver C ntr l Unit, either c -l cated with the Receiver r at a different p siti n
fr m that f the Receiver. In this case use the ETHERNET interface n the Receiver
and c nnect a cable t p rt 1 thr ugh p rt 7 n the RCU-400A.
PN 74446
3-2

FIGURE 3-1 RX-400A and RCU-400A INSTALLATION
PN 74446
3-3

TABLE 3-2
RX-400A AUDIO CONNECTIONS
PN 74446
3-4