ELECTRICAL AND MECHANICAL TELECOMMUNICATIONS ENGINEERING REGULATIONS H 610 (By Command of the Defence Council)

CONDITIONS OF RELEASE

1. ThL Infomatlon L releued by the UK Government 10 the recipient Government for Defence purpose only.

3. ThL Information m y be d l l o s c d only within the Defenca Department of tha recipient Government. except u o t h e m h

2. Thlr infonnatlon must be accorded the u m e degree of rcclulty authorized by MLnLtn of Defence (Army).

~rotect ion u that accorded thereto by the UK Government. 4. Tblr hfomutlon m y be ~ b l s c t to pdvntely owned -Is.

STATION, RADI 0, UK/VRC 353

TECHNICAL HANDBOOK - DATA SUMMARY

EQUIPMENT IDENTITY

Station, radio, UK/VRC 353 NSN (NYA)

comprising:

TxIRx UKIRT 353 Z 115820.99- 1 14-3959 T.U.A.A.M. with shock mounting Z 11582 1-99-630.6 1 57

T.U.A.A.M. without shock mounting Z 1 1582 1-99-630-6 1 56 A. R. F.A.T. Z 115820-99-630-6465

Issue 1, Jan 77 (15K)

Fig 1 - General view of equipment

Page 1

TELECOMMUNICATIONS H 610

INSTALLED EQUIPMENT:

r

ELECTRICAL AND .MECHANICAL' ENGINEERING REGULATIONS

Transmitter receiver radio UKIRT 353 Tuning unit automatic antenna matching (t.u.a.a.m.) Adaptor radio frequency antenna tuning (a.r.f.at ).

WARNINGS

High Voltage: The UKIRT 353 has an 800V d.c. internal supply and due care must & exercised when the equipment is uncased.

Beryllium: The UK/RT 353 uses components containing berytlium or beryllium oxide. In certain conditions they can-constitute a hazard to health. Before working on the equipment, consult EMER Gen K 050 - Beryllium Toxic Hazard in Electronic Equipments - which gives general information, handling and disposal instructions.

ROLE

The UK/VRC 353 is a vehicle radio installation for use in armoured and soft skin vehicles of the Royal Marines, Army and RAF. The equipment will provide command and co-operation communi/ cations for mounted troDps, and replace the C42 Nos 1,2 and 3, C45 Nos 1,2 and 3 and the 8471 B48 in some roles It may also be used as part of &ground station.

BRIEF DESCRIPTION

The UKIRT 353 is a v.h.f. (f.m.) transmitterlreceiver providing the following modes of operation over a nominal range of 32 km:

Voice: Narrow band (25kHz) and wide band (50kHz) Facsimile: With special interface equipment Telegraph: Up to 150 bauds in conjunction with the Adaptor Telegraph RMio Data: Up to 750 bauds in conjunction with Adaptor Telegraph Radio, up to 20

kbits per second from high speed'data equipment connected via harness socket.

The equipment may be used in one of thke basic configurations. These are:

By a local operator (via AUDIO sockets) By a harness operator (via HARNESS connector) By a remote operator (via REMOTE terminals).

Tuning unit automatic antenna matching - -

Provides matching between the UK/RT 353 and vehicle mounted whip antenna.

Adaptor radio frequency antenna matching

Reduces the r.f. output power of the UK/RT 353 to an acceptable level during the tuning sequence of the t.u.a.a.m.

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ELECTRICAL AND MECHANICAL TE LECOIWMUNICATIONS ENGINEERING REGULATIONS H 610

PHYSICAL DATA

Height Width - Depth - Weight - UK/RT 353 217 mm (8.5 in.) 243 mm (9.6 in.) 359 mm (14.1 in.) 22 kg (48.5 Ib) T.U.A.A.M. 143 mm (5.6 in.) 131 mm (5.15 in.) 235 mm (9.25 in.) 3.40 kg (7.5 Ib) A.R.F.A.T. 115 mm (4.5 in.) 164 mm (6.45 in.) 67 mm (2.6 in.) 0.9 kg (2.0.lb)

CLIMATIC RANGE

Temperature: Operating -40 to +53OC Storage -40 to +65OC Plus a temperature rise a t the upper limit due to solar radiation falling directly on to the equipment.for six hours per day.

Humidity: Operation and storage up to 100% humidity with temperature not normall9 exceeding 300C.

Altitude: Operation and storage up to 3000 m (10,006 ft).

TRANSPORTATION DATA

Altitude: Air transportable up to 7,500 m (25,000 ft) unpressurised or up to 12,000 m (40,000 ft) pressurised. Sudden depressurisation at up to 12,000 m (40,000 ft) will not result in damage to surrounding objects.

I mmersion: The equipment will withstand immersion to a covering depth of 1.6 m (5 ft) in salt or fresh water for at least 2 hours without affecting operation.

Handling: The equipment can be dropped from aircraft using normal parachute delivery techniques.

PACKAGING DATA

U K/ RT 353 SRDE/PKG/1143159 T.U.A.A.M. CPU/6306156 A R. FAT. SR D E/TS/1560.

OPERATIONAL DATA

The harness plug interconnects the radio to either the Clansman radio control harness, or the Clansman wide band data harness. Two remote terminals may be used to connect audio and cqntrol signals via Dl0 cable, from remote equipment situated up to 3 km (2 miles) away. The a.rif.a.t. connector is used to supply the control signals to the a.r.f.a.t. and t.u.a.a.m.

T.U.A.A.M.

Interconnects the r.f. signal between the a.r.f.a.t. and the whip antenna.

A.R.F.A.T.

Connects the r.f. signals and control voltages between the RT 353 and the tu.a.a.m.

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TELECOMMUNICATIONS ELECTRICAL AND MECHANICAL H 610 ENGINEERING REGULATIONS

Antenna . .

Antenna element: 24215985-99-630-8455 (2 off) Antenna base assembly: . Z42/5985-99-6306495 (1 off) Clansman alternative v.h.f. antenna systems.

PERFORMANCE

Ground stations: Maximum range over average rolling terrain in Western Europe 32 km, using the omnidirectional antenna.

Mobile station:

ELECTRICAL DATA

UWRT 353

Frequency range:

Accuracy:

Compatability:

Maximum range over average rolling terrain in Western Europe using a whip antenna will produce a 75% probability of achieving communication at 32 km.

30 to 75.975MHzt 25kHz channel spacing narrow band, 5OkHz channel spacing wide band.

Better than r 5 p.p.m.

The equipment will interoperate on voice with:

a. All other v.h.f. Clansman equipment.

b. All existing v.h.f. (f.m.) equipment using 50kHz channel spac- ing in the band 30 to 75.950MHz.

Transmitter

Power output:

Full deviation:

Four levels, lOOmW (MIN), 1 W, 15W and 50W nominal, according to front panel switch setting.

Full deviation is produced by a lkHz input at any level between 28 and 80mV r.m.s. e.m.f. applied between pins A and B of AUDIO sockets with gain control at minimum. Full deviation is produced by a 1kHz input at any level between 80mV and 4V r.m.s. applied at eitherREMOTE terminals or HARNESS connector pins A and B.

Full datadeviation: Binary input of regular 00001 1 1 1 pattern at 16 kbits per second (WIDE) 8 kbits per second (NARROW) at a level of 3.2V e.m.f. peak to peak applied a t HARNESS connector pin A.

When in the data'mode automatic rebroadcast is not available unless an additional control box is employed.

Receiver

Sensitivity: Analogue: 0.5pV e.m.f. for 6dB S+N/N ratio.

Data: Error rates as specified below for input of unfiltered data at 16 kbits per second at levels detailed

Issue 1, Jan 77

ELECTRICAL AND MECHANICAL TELECOMMUNICATIONS ENGINEERING .REGULATIONS H 610

Signal source Error rate

1;413pV e.m.f. Less than 0.3% 1.OpV e.m.f. Less than 4% 0.71pV e.m.f. Less than 14% 0.5pV e.m.f. Less than 26%

Unwanted signal rejection:

A F. output:

Remote control:

Metering facilities:

LPS 'OFF :

FANS OFF:

28V SP LY:

RX SIG:

TX OIP:

AFC TX:

SYNTH:

TEMP: ,

ARFAT: .

~ r e i e r than 61dB for all. channels within &2% of the channel frequency in-use.

2.7V r.m.s. nominal into 7552 at AUDIO sockets. 1.7V r.m.s. nominal into 7552 a t HARNESS socket 0.75V r.m.s. nominal into 30051 a t REMOTE terminals.

Equipment will transmit when a d.c. current of 8 1 W is drawn from the REMOTE terminals with REMOTE switch in REM or,AUTO position. Equipment will generate a call tone of 2kHz when a d.c. current greater than 20mA is drawn from the REMOTE terminals.

Provided by a ten position front panel switch and meter as follows:

All lamps off, meter reads received signal strength.

Fans and lamps off, transmitter inhibited, meter reads received signal strength.

Meter indicates supply voltage on marked scale.

Meter indicates received signal strength on arbitrary scale.

Meter indicates that the transmitter output valve is diawing the correct current

The pointer should be within +3 divisions of centre for correct operation of the transmitter frequency control loop.

The meter indicates .whether the synthesiser is locked, normally pointer to right of centre.

The meter indicates the internal temperature of the set, normally right of centre.

The meter indicates arfat temperature state, normally right of centre..

This is a bias switch position and overrides the TEMP and ARFAT alarms. The squelch circuit is overriden and the cooling fans switched on.

(These facilities can be used to isolate certain fault conditions which are indicated by an audible and visible alarm system)

Sidetone: .True sidetone (provides a quick functional. check of the equipment).

Issue 1, Jan 77

ELECTRICAL AND MECHANICAL' ENGINEERING REGULATIONS

POWER REQQllREMENTS . .

24V d.c nominal. 21.W d.c.'minimum, 35V d.c. maximum.

Current: 1 2A at 2 8 ~ d.c. maximum. BlOA nominal' a t 28V. d.c, on transmit. 2,4A nominal at 28V d.c. on receive.

ASSOCIATED EQUIPMENT

Clansman radio control harness Clansman infsylm and-'6-'. vehicle heidgear Clansman alternative vA.f.;antenria systems

-.T.uAAM. and A R.F.A.T.: See Tels L 210 for electrical details

MAINTENANCE

Unit repairs: Removal and repair of loose CES items, plus replacement of fmnt pane1 knobs by first line REME support. 1

Field repairs: Replacement of faulty assembiies, subassemblies and certain discrete components. Some subassemblies are throwaway items CENTREMs are repaired a t nominated workshop only.

Base repain: Ove*aul of complete equipment, repair of CENTREMs and 'Major assemblies'.

ASSOCIATED PUBLICA'fl.ONS AND REFERENCES

User Hand book: NYA CES:. NYA I Ilustrated Parts Catalogue: , NYA Clansman Audio Accessories: Tels C 740 Clansman Radio Control Harness: Tels L 800 Clansman v.h.f. Anten& Systems: Tels L 21 0.

EME 8/2574/Tels"a

END

Issue 1, Jan 77