Index of /tsc-60/mot-sat/URC-1xx

      Name                    Last modified       Size  Description


[DIR] Parent Directory        28-Aug-2005 14:35      -  

#
# Information on the URC Family (Late 1980's to mid 1990's)
#
Information is from: http://www.milspec.ca/radspec/radspec.html


AN/URC-100 series
The Motorola AN/URC-100 series of radios evolved from the PT-25A Portable Emergency Transceiver (1978).  
Prior to nomenclature assignment, the original AN/URC-100 (NSN 5820-01-112-0176) was known 
as the PRT-250 (Motorola model number).  The design concept of the URC series is to develop a 
multi-purpose radio system that would accommodate manpack, aircraft, shipboard and vehicular 
uses in the VHF and UHF air bands.   The design is fully solid state and fully synthesized.  

As a manpack set, the radio is nomenclatured the AN/URC-100.  In an LOS/SATCOM 
configurations, it is known as the AN/URC-101 (NSN 5820-01-112-0177).  For SATCOM 
applications, the URC-101 had both transmitter output power and receiver sensitivity 
increased.  Modes of operation for the URC-100 & URC-101 include AM or FM clear or secure 
voice and a 300 Hz to 2.5 kHz linear swept baseband beacon signal.  Both sets have a 
frequency range of 116 to 150 MHz and 225 to 400 MHz in 25 kHz steps.

The first variation of the URC-100 appears as the AN/URC-100(V) which replaced the 
original 116 to 150 MHz VHF band with the tactical 30 to 88 MHz band and saw the 
addition of the standard 150 Hz squelch tone for compatibility with the VRC-12 series 
and the PRC-25, PRC-77 series of radio sets.

The variations in the URC-101 include a AN/URC-101(V) which is deemed a 
data transceiver.   The changes include 5 kHz channel spacing in the 116 to 150 
and 225 to 400 MHz bands.  Also, this unit saw the addition of extra RF connectors 
to the front panel labeled IF, UHF OUT and UHF IN located on the far 
left of the transceiver between the HANDSET and the UHF ANTENNA connectors. The connectors 
provide 70 MHz IF baseband compatibility for use with the Motorola PM-15 Adaptive Tactical Modem.

A second variation to the URC-101 includes a VHF band change from the 116 to 150 MHz 
band to the 100 to 174 MHz band in the FM mode only with a 2.5 and 25 kHz spacing 
and is nomenclatured the AN/URC-101(V)2.  The UHF band remains unchanged and the output RF power is 1.5 or 5 Watts.

With the progression of time and the requirements for a tactical VHF/UHF transceiver, 
with nomenclature that would stop all confusions of  "which band does this radio operate on?", 
Motorola released the AN/URC-104 (NSN 5820-01-131-5674) and the AN/URC-111 (NSN 5820-01-152-3185) 
respectively.  Both sets feature operability in the 30 to 88 MHz band with 150 Hz 
squelch tone and 225 to 400 MHz band.  Channel spacing is 25 kHz.  The design 
principals are for a radio set that is suitable for ground-to-air/air-to-ground and 
tactical point-to-point operations.   The units also operate in clear or secure voice or 
data modes and are compatible with the KY-57, KY-58 cypher equipment.  

All previous URC features are included in these current version radios.

Also introduced at the same time is a specific data transceiver known as 
the AN/URC-110 (NSN 5820-01-151-4199).  The URC-110 operates in the 116 to 150 MHz band 
and in the 225 to 400 MHz band in 5 kHz steps.  The URC-110 is designed with a 
low noise synthesizer to permit operation with tactical modems such as the 
Motorola PM-15A and meets satellite architecture requirements.  
The URC-110 can also function as a repeater/frequency translator.

For LOS/SATCOM use, the AN/URC-112 (NSN 5820-01-151-4198) was introduced 
and is labeled as an "LOS/SATCOM transceiver".  Frequency coverage 
includes 160 to 172 MHz with 2.5 kHz channel spacing and 225 to 416 MHz 
with 25 kHz channel spacing.  The URC-112 can be made compatible with 
the AN/UYA-7 & AN/GYC-8 transceivers and the AN/UGC-129 and AN/UGC-74 message devices.  
The URC-112 will operate in the appropriate mode with 
the AN/ARC-164, AN/ARC-171 and the AN/WSC-3 transceivers.

Some accessories for the above radio sets includes various AC, DC, AC/DC power 
supplies and battery boxes, antenna, modems etc...  The most varied 
accessory appears to be the battery box.  For the most part the "box" or 
enclosure appears to be common but the inserts vary from a PRC-25 battery 
insert, a Lithium battery insert PL-1500/URC (PTL-110A) which uses 2 BA-5590/U 
Lithium batteries, a NiCad battery insert (PP-7962/URC (PTMG-120)) with 
build-in multi-voltage charger which uses 2 BB-590/U batteries and a 
rechargeable NiCad "D" cell box complete with built-in 120/240 VAC charger.  
Further power sources include a 28 VDC adapter box which employs standard VRC 
series DC connectors and a universal power supply, the PP-7961/URC 
(Motorola number PTAD-101A) which includes input voltages from 120/240 VAC and 24 VDC.

The modem, PM-15, is an Adaptive Tactical Modem operating at 300, 1200 and 2400 bits/s.   
This unit requires a 70 MHz RF interface and 1 BA-5590/U or BB-590/U battery 
to operate.  Modulation formats are differentially encoded bi-phase shift 
keying (dbpsk) for the 300 and 1200 bits/s modes and, differentially 
encoded quadraphase shift keying (dqpsk) in the 2400 bits/s mode.

Also available is a UHF, 200 Watts RF linear power amplifier nomenclatured 
the AM-7175/URC (NSN 5895-01-175-9853).  The AM-7175/URC is a 
variable, 50 to 200 Watts, (by a rotary knob on the front panel) output 
RF power amplifier that operates in the AM, FM and CW mode and will 
deliver 50 Watts in AM (200 Watts peek) and 200 Watts in FM mode, requires 
a 2 to 25 Watt input RF power drive.

To aid in the rapid test and service of the various transceivers, 
Motorola also introduced the PTPT-100 Radio Test Set.  The unit can be 
employed to verify the radio's performance, for troubleshooting faulty 
equipment, and to perform radio adjustments such as frequency, transmitter power and modulation.

Below is a short summary to help differentiate configuration options between models.

MODEL
(AN/URC) VHF
band UHF
band SPACING
kHz PWR
VHF LO PWR
VHF HI PWR
UHF AM LOW PWR
UHF AM
HI PWR
UHF FM LOW PWR 
UHF FM HIGH 

URC-100 116 - 150 225 - 400 25 1.5 5 1.5 5 1.5 5 
URC-101 116 -150 225 - 400 25 1.5 5 1.5 5 5 20 
URC-101(V) 116 - 150 225 - 400 5             
URC-101(V)2 100 - 174 225 - 400 2.5 & 25 1.5 5 1.5 5 1.5 5 
URC-104 30 - 88 225 - 400 25 1.5 5 1.5 5 5 5 
URC-110 116 - 150 225 - 400 5 1.5 5 1.5 5 5 20 
URC-111 30 - 88 225 - 400 25 1.5 5 1.5 5 1.5 5 
URC-112 160 - 172 225 - 416 2.5 VHF
25  UHF 1.5 20 1.5 20 1.5 20 

Publications:
AN/URC-101, Motorola Document No. 68-P09980V
PTPT-100 Radio Test Set Operators Guide, Motorola Document No. 68-P09319W

Note: A technical manual of the URC-110 is available