Continuing the tradition of fine professional communications receivers designed and built by Rockwell-Collins Canada, the HF 2050 receiver covers 14kHz - 30MHz and features a built-in speaker, DSP, noise blanker, squelch, up to 100 memories, 3 speed 10Hz tuning resolution, keypad for data entry, scan, variable AGC, extensive built-in self test, and a large liquid crystal alpha-numeric display.

R-5099/U, R-5099A/U, and R-5104/GRC-508 Radio Receiver (receiver) is designed as a highly reliable hf SSB/ISB receiver. The receiver has a frequency range of 14 kHz to 29.999 99 MHz tunable in 10-Hz steps over its entire range. In its basic configuration, it includes the following modes of operation: USB/LSB, CW, and AM.

Some of the outstanding features of the R-5099iU, R-5099A/U, and R-5104/GRC-508 Radio Receivers are as follows:

• Digital signal processing techniques.
• A microprocessor, keypad, and alphanumeric display that control and monitor all receiver functions.
• Frequency selection from the keypad, rotary tuning control, or 30 preset channels.
• Built-in test (BIT) for fault isolation to card/ module or functional circuit level.
• Five selectable bandwidths.
• ISB mode.
• FSK mode when used with an external modem.
• Remote control interface (RS-422).
• Noise blanker with adjustable threshold.
• Voice squelch with front panel adjustable thresh-old.
• High-performance frequency standard.

Electrical: (signal levels are open circuit from 50-ohm source, unless otherwise specified)

Modes of operation: CW, AM, USB or LSB, (ISB optional), and FSK (with external modem)

Frequency range: 14 kHz to 29.999 99 MHz in 10-Hz increments

Frequency stability: Less than +/- 1 x 10E-8 at 0 to + 50 degrees C (+ 2 to + 122 degrees F). Drift rate of not more than 3x 10E-8 per month.

Channeling speed: 50 ms maximum

Preset channel memory: 30-channel capacity. Each channel contains frequency, mode, bandwidth, AGC, and BFO information.

Sensitivity (SSB): 14 kHz to 500 kHz: 2.5 microvolt for 10 dB (s+ n)/n. 500 kHz to 29.999 99 MHz: 0.82 p V for 10 dB (s+ n)/n

Intermodulation distortion: In band: 40 dB or greater below either of two input tones at – 13 dBm per tone. Tones must be within IF passband with greater than 200-Hz separation. Out of band: Third order intercept point greater than +25 dBm. Second order intercept point greater than +40 dBm

Spurious responses: IF rejection: 80 dB min.

Image rejection: 80 dB min.

Internal spurious: Less than 0.5-p.V equivalent input

External spurious rejection: 80 dB min at 20 kHz or more off tuned frequency

Audio outputs: Line:  600 ohms, 10%, balanced; adjustable from – 20 to + 10 dBm for 3-uV  input in USB; maximum 1% distortion

Headphone: Up to + 10 dBm into 600 ohms; maximum 5% distortion.

Speaker: 2.5 W peak into 8 ohms; maximum 5% distortion

AGC threshold: 3 u,V maximum

AGC control: Less than 5-dB rise in audio output for signal increase from 1.4 p V to 0.2 V in USB

AGC time constants:
Attack time: less than 30 ms
Fast decay time: 200 to 300 ms
Slow decay. time: 3.0 to 4.0 s

Manual: greater than 100-dB range

Squelch: Operates on audio signal-plus-noise to noise ratio. Applicable to headphone and speaker outputs only.

Bandwidths: 2.80-kHz USB/LSB/ISB,     0.3-kHz, 1.0-kHz CW,     bandpass filters 3.2-kHz,    6.0-kHz AM bandpass filters

Antenna input impedance: 50 ohms nominal, unbalanced 2:1 vswr max for 2.0 to 29.999 99 MHz

RF overload protection: Up to +47-dBm RF input, power on or off

Power requirements: 115 V ac +/- 10%, 47 to 63 Hz, single-phase ac; 100 W nominal

Environmental Temperature: Full performance: 0 to +50 degrees C (+32 to +122 degrees F).  Non-operating: -62 to +71 degrees C (-80 to +160 degrees F)

Humidity: 0 to 95% relative humidity, no condensation

Altitude: Operating: 0 to 3658m (12 000 ft)
Nonoperating: 0 to 12910m (40 000 ft)

Physical Size: (5.25 in)high x (19 in) wide x (19. 6 in) deep  with handle

Weight: 17.2 kg (38.0 Ib) maximum

1998 - 1999 Toronto Surplus & Scientific Inc.
July 21/99