ET-539 25-CHANNEL CORDLESS PHONE WITH LIGHTED KEYPAD
(430-1039) Specifications Faxback Doc. # 39201
Product Safety Notice
Many electrical and mechanical parts in this chassis have special safety
characteristics. These characteristics often pass unnoticed and protection
afforded by them cannot necessarily be obtained by using replacement com-
ponents rated for higher voltage, wattage, etc. Replacement parts that have
these special safety characteristics are identified in this manual and its
supplements; electrical components having such features are identified by !
in the schematic diagram and the parts list.
Before replacing any of these components, read the parts list in this man-
ual carefully. The use of substitute replacement parts that do not have the
same safety characteristics as specified in the parts list may create shock,
fire or other hazards.
Specifications
Measurement Conditions
Temperature: ..................................... From 41 to 77 degrees F
(5 to 25 degrees C)
Standard voltage:
Handset unit: ...................................... 3.6 VDC +/- 0.1 V
Base unit: .......................................... 120 VAC +/- 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 dBA
Standard phone line input: ....................................... -19 dBA
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
Measurement method: Based on EIA Standard RS-316A procedure for cordless
phones.
Other remarks: All receiver performances, except radiated sensitivity, are
required to use a 50 Ohm sourced signal generator to ANT
terminal, excluding the ANT load coil.
All transmitter performances, except radiated power output,
are measured with a 50 Ohm resistive load.
Test conditions:
1. A 12 x 20 inch metal sheet must be placed under the unit to be tested.
A soft foam pad covering the plate is also recommended.
2. A 12 VDC nickel-cadmium battery pack with an AC adapter is also required
to reduce AC line effect and variations in sensitivity and power output
for the base unit test.
HANDSET UNIT
Receiver:
Nominal Limit Unit
Sensitivity at 12 dB SINAD 0.8 1.5 microV
Bandwidth at -6 dB +/-6 +/-4 kHz
Adjacent channel selectivity 30 15 dB
+/- 15 kHz
Image rejection 50 40 dB
Spurious (-1/2 IF) 60 40 dB
THD at 100 microV RF input 4 8 %
S/N at 1 mV RF input 60 54 dB
Frequency response reference 1 kHz:
500 Hz 2 +/-5 dB
2.5 kHz -12 +/-5 dB
Audio output level @ 2 kHz deviation:
Normal volume 45 30 mV rms
High volume 90 60 mV rms
Frequency tolerance +/-500 +/-1000 Hz
Transmitter:
RF output voltage 1100 +/-300 mVp-p
Frequency tolerance +/-500 +/-1000 Hz
Modulation sensitivity for 18 30 mV rms
2 kHz deviation
Modulation THD @ 2 kHz deviation 3 8 %
S/N @ 2 kHz deviation 35 25 dB
Frequency response @ 2 kHz deviation:
500 Hz -4 +/-3 dB
2.5 kHz -1 +/-3 dB
Minimum operating voltage 3.0 3.1 V
Current drain at standby 16 20 mA
Current drain at standby sleep 2 3.5 mA
Current drain at talk @ light on 80 100 mA
@ light off 40 50 mA
Battery low LED voltage 3.3 +/0.2/-0.1 V
Frequency variations against 600 1000 Hz
battery voltage (3.2-4.2 V)
Base Unit:
Receiver:
Sensitivity at 12 dB SINAD 0.5 1.5 microV
Squelch sensitivity 0.5 2 microV
Bandwidth at -6 dB +/-6.0 +/-4.0 kHz
Adjacent channel selectivity 30 15 dB
@ +/-15 kHz
Image rejection 50 40 dB
Spurious rejection (-1/2 IF) 60 40 dB
THD at 100 microV RF input 4 8 %
S/N at 1 mV RF input 65 56 dB
Frequency response reference 1 kHz
500 Hz -1 +/-5 dB
2.5 kHz -5 +/-5 dB
Line output level @ 2 kHz deviation -8 +/-3 dBm
Frequency tolerance +/-500 +/-2000 Hz
Transmitter:
RF output voltage 300 +/-60 mVp-p
Frequency tolerance +/-500 +/-1000 Hz
Modulation sensitivity @ -19 dBm input 3.3 2.5-4.0 kHz
Modulation THD @ 2 kHz deviation 3 8 %
S/N @ 2 kHz deviation 35 25 dB
Frequency response @ 2 kHz deviation
500 Hz -2 +/-3 dB
2.5 kHz 5 +/-4 dB
Minimum operating voltage 105 VAC
Telephone Line Interface:
Pulse Dialing:
Dial rate 10 8-11 pps
Break ratio 60 58-64 %
Interdigital interval 800 +/-200 ms
Access pause 2.0 4.0 sec
Flash 700 +/-200
Interdigital interval between pulse/tone 800 ms
Waiting time after flash 1000 +/-200
Pulse dial Sidetone @ 80 mA 76 70-82 dBSPL
Tone Dialing:
Waiting time after flash 100 +/-200 ms
Frequency, DTMF:
Row 1 697 687-707 Hz
Row 2 770 759-781 Hz
Row 3 852 840-864 Hz
Row 4 941 927-955 Hz
Column 1 1209 1191-1227 Hz
Column 2 1336 1316-1356 Hz
Column 3 1477 1455-1499 Hz
Transmit level, 20-80 mA loop
Row 1 -5.5 -10 dBm
Column 3 -3.5 -8 dBm
THD, 20-80 mA loop high/low groups 5.0 10 %
DTMF Sidetone level 96 +/-6 dBSPL
Timing, duration 100 80-110 ms
100 80-110 ms Interval
Access pause 2.0 4.0 sec
Ringer:
SPL, A weighting @ 1 foot 90 80 dBSPL
(60 V rms, 20 Hz)
Minimum ringer start voltage @ 20 Hz 35 20-40 V rms
Sine wave:
Ringer delay due to battery saving 600 700 ms
DC resistance and return loss
On-hook DC resistance @ 50 V 10 5 MOhm
On-hook impedance @ 40 V rms 8 kOhm
Off-hook DC resistance 180 100-300 Ohm
Return loss, 600 Ohm, 50 mA: @ 200 Hz: 3.5 dB
@ 500-2500 Hz 7.0 dB
@ 3200 Hz 3.5 dB
NOTE: Nominal specs represent the design specs. All units should be able to
approximate these - some will exceed and some may drop slightly below these
specs. Limit specs represent the absolute worst condition that still might
be considered acceptable; in no case should a unit fail to meet limit specs.
Specifications are typical; individual units might vary. Specifications are
subject to change and improvement without notice.
(br/EB 4/25/97)
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