ET-542 All Weather 25-Channel Cordless Telephone
(430-1042) Specifications Faxback Doc. # 39068
MEASUREMENT CONDITIONS
Temperature...................................From 41 F - 77 F (5 C - 25 C)
Standard voltage
Handset unit..............................................DC 3.6 V +/-0.1 V
Base unit..................................................120 V AC +/- 10%
Antenna load.........................................................50 ohm
Standard modulation frequency.........................................1 kHz
Standard deviation....................................................2 kHz
Telephone line load.................................................600 ohm
Receiver load.......................................................150 ohm
Standard sound level...............................................90 dBSPL
Standard phone line input...........................................-19 dBm
Channel frequency:
Channel No. Handset Transmit Frequency Base Transmit Frequency
1 48.760 MHz 43.720 MHz
2 48.840 MHz 43.740 MHz
3 48.860 MHz 43.820 MHz
4 48.920 MHz 43.840 MHz
5 49.020 MHz 43.920 MHz
6 49.080 MHz 43.960 MHz
7 49.100 MHz 44.120 MHz
8 49.160 MHz 44.160 MHz
9 49.200 MHz 44.180 MHz
10 49.240 MHz 44.200 MHz
11 49.280 MHz 44.320 MHz
12 49.360 MHz 44.360 MHz
13 49.400 MHz 44.400 MHz
14 49.460 MHz 44.460 MHz
15 49.500 MHz 44.480 MHz
16 49.670 MHz 46.610 MHz
17 49.845 MHz 46.630 MHz
18 49.860 MHz 46.670 MHz
19 49.770 MHz 46.710 MHz
20 49.875 MHz 46.730 MHz
21 49.830 MHz 46.770 MHz
22 49.890 MHz 46.830 MHz
23 49.930 MHz 46.870 MHz
24 49.990 MHz 46.930 MHz
25 49.970 MHz 46.970 MHz
HANDSET UNIT
Receiver
Sensitivity at 12 dB SINAD...........................................0.8 uV
Bandwidth at -6 dB.................................................+/-6 kHz
Adjacent channel selectivity +/-15 kHz................................30 dB
Image rejection.......................................................50 dB
Spurious rejection (-1/2 IF)..........................................60 dB
THD at 100 uV RF input..................................................4 %
S/N at 1 mV RF input..................................................60 dB
Frequency response reference 1 kHz
500 Hz.................................................................2 dB
2.5 kHz..............................................................-12 dB
Audio output level @ 2 kHz deviation
Normal volume......................................................45 mVrms
High volume........................................................90 mVrms
Frequency tolerance...............................................+/-500 Hz
Transmitter
RF output voltage................................................1100 mVp-p
Frequency tolerance...............................................+/-500 Hz
Modulation sensitivity for 2 kHz deviation.........................18 mVrms
S/N @ 2 kHz deviation...................................................3 %
Frequency response @ 2 kHz deviation
500 Hz................................................................-4 dB
2.5 kHz...............................................................-1 dB
Minimum operating voltage.............................................3.0 V
Current drain at standby..............................................16 mA
Current drain at standby sleep.........................................2 mA
Current drain at talk @ light on......................................80 mA
Current drain at talk @ light off.....................................40 mA
Battery low LED voltage...............................................3.3 V
Frequency variations against battery voltage (3.2 - 4.2 V)...........600 Hz
BASE UNIT
Receiver
Sensitivity at 12 dB SINAD...........................................0.5 uV
Squelch sensitivity..................................................0.5 uV
Bandwidth at -6 dB...............................................+/-6.0 kHz
Adjacent channel selectivity @ +/- 15 kHz.............................30 dB
Image rejection.......................................................50 dB
Spurious rejection (-1/2 IF)..........................................60 dB
THD at 100 uV RF input..................................................4 %
S/N at 1 mV RF input..................................................65 dB
Frequency response reference 1 kHz
500 Hz................................................................-1 dB
2.5 kHz...............................................................-5 dB
Line output level @ 2 kHz deviation..................................-8 dBm
Frequency tolerance...............................................+/-500 Hz
Transmitter
RF output voltage.................................................300 mVp-p
Frequency tolerance...............................................+/-500 Hz
Modulation sensitivity @ -19 dBm input..............................3.3 kHz
Modulation THD @ 2 kHz deviation........................................3 %
S/N @ 2 kHz deviation.................................................35 dB
Frequency response @ 2 kHz deviation
500 Hz................................................................-2 dB
2.5 kHz................................................................5 dB
Minimum operating voltage...........................................105 VAC
Telephone Line Interface
PULSE DIALING
Dial rate............................................................10 pps
Break ratio............................................................60 %
Interdigital interval................................................800 ms
Access pause........................................................2.0 sec
Flash...................................................................700
Interdigital interval between pulse/tone.............................800 ms
Waiting time after flash...............................................1000
Pulse dial sidetone @ 80 mA........................................76 dBSPL
TONE DIALING
Waiting time after flash.............................................100 ms
Frequency, DTMF
Row 1................................................................697 Hz
Row 2................................................................770 Hz
Row 3................................................................852 Hz
Row 4................................................................941 Hz
Column 1............................................................1209 Hz
Column 2............................................................1336 Hz
Column 3............................................................1477 Hz
Transmit level, 20-80 mA loop
Row 1..............................................................-5.5 dBm
Column 3...........................................................-3.5 dBm
THD, 20-80 mA loop high/low groups....................................5.0 %
DTMF sidetone level................................................96 dBSPL
Timing, duration.....................................................100 ms
Interval.................................................................ms
Access pause........................................................2.0 sec
Ringer
SPL, A weighting @ 1 foot (60 Vrms, 20 Hz).........................90 dBSPL
Minimum ringer start voltage @ 20 Hz................................35 Vrms
Sine wave
Ringer delay due to battery saving...................................600 ms
DC resistance and return loss
On-hook DC resistance @ 50 V........................................10 Mohm
On-hook impedance @ 40 Vrms..........................................8 kohm
Off-hook DC resistance..............................................180 ohm
Return loss, 600 ohm, 50 mA
@ 200 Hz.............................................................3.5 dB
@ 500-2500 Hz........................................................7.0 dB
@ 3200 Hz............................................................3.5 dB
Specifications are typical; individual units might vary. Specifications
are subject to change and improvement without notice.
(km-04/21/1997)
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