RTU-292C Operations Manual
1-6
Table 1-3
RTU-292C Specifications
TELEPHONE LINE INTERFACE (J1, RJ-11 Connector)
Output & Input Levels to Phone Line
Nominally -12 dBm. (Adjustable -21 to 0 dBm in 3 dB steps).
Frequency Response
+2 dB, 300 to 3200 Hz.
Output Impedance to Phone Line
600 Ohms.
VOX Sensitivity
16 +2 dB Below Phone Line Input Level Setting. (-
25 dBm @ -9 dBm Level Setting, for example)
VOX Hang Time
0.6 Second or 2.0 Seconds, (Internally Settable).
Hybrid Balance/Adaptation Speed
(into 600 Ohm)
-30 dB over 300 to 3200 Hz BW within 1.25 Sec.; measured with
white noise source.
Ultimate Hybrid Balance (into 600 Ohm)
-50 dB typical over 300 to 3200 Hz BW; measured with single tone.
Hybrid Impedance Matching Capability
0 to 10k Ohm Complex Impedance.
RADIO INTERFACE (P1, Male DB-9 Connector)
Input Impedance
Balanced or Unbalanced 600 Ohm or Unbalanced 47K Ohm.
Input Level
-40 to +10 dBm, Internally Adjustable.
Output Impedance
600 Ohm balanced.
Output Level
-40 to +10 dBm, Internally Adjustable
Frequency Response
300 to 3200 Hz + 2 dB.
Key Relay Output
Low Level Relay Contacts, 60VA max., Switching Speed: 5 msec.
GENERAL
Handset (RJ12C Jack)
Electret microphone, dynamic receiver.
Dialing Modes
DTMF, Pulse at 10 pps
Pulse Dial Make/Break Ratio
40/60.
Dialing Keypad
3x4, Standard Telephone Layout.
Microphone Interface
ALC (Automatic Level Control) with 30 dB dynamic range.
Speaker Driver Power
4W min @ 10% Distortion.
Internal Speaker
3-inch square, 3.2 Ohms.
Indicators
Peak Level, Keyed, and Indicator for each pushbutton.
Front Panel Controls
Power Switch, Dialing Keypad, Speaker and Handset Volume
Controls, Pushbuttons: Tel Line/Phone, Tel Line/Radio, Off,
Handset/Phone, Handset/Radio, Speaker/Phone, Speaker/Radio, Tel
VOX, Manual Key, Auto Answer, Audible Ring.
AC Input Power (External Supply)
90 to 270 VAC, 47-63 Hz, 20 VA typical, 50 VA max.
DC Input Power
+11 to +15VDC or +22 to +30VDC, 1 A Maximum.
Size
3.5"H x 19"W x 10"D (8.9 x 48.3 x 25.4 cm)
Weight
9 lbs. (4 kg).
ENVIRONMENTAL
Operating Temperature
-20
0
C to +55
0
C.
Storage Temperature
-40
0
C to +85
0
C.
Humidity
Up to 95% @ 55
0
C.
Shock
MIL-STD-810D, method 516.3 procedure VI.
Vibration
MIL STD 810D, method 514.3 Category I.
REGULATORY COMPLIANCE
FCC part 15
Emissions for US and Canada
FCC Part 68
Phone line test
End of Section 1
Summary of Contents for RTU-292C
Page 4: ...RTU 292C Operations Manual 4 Blank Page...
Page 12: ...RTU 292C Operations Manual 12 This page intentionally left blank...
Page 35: ...RTU 292C Operations Manual 2 17 Figure 2 1 Outline Dimensions...
Page 37: ...RTU 292C Operations Manual 2 19 Figure 2 3 Location of Internal Option Settings...
Page 38: ...RTU 292C Operations Manual 2 20 Figure 2 4 Internal Option Settings Details...
Page 39: ...RTU 292C Operations Manual 2 21 Figure 2 5 Audio Interface Wiring Diagram...
Page 40: ...RTU 292C Operations Manual 2 22 Figure 2 6 Interface Details...