Frequency Bands; Frontends - Philips Avalon CTS M2720A Service Manual

Frequency Bands

Modulation type
Frequency Bands
Frequency Range
420 to 430 MHz, of which the following sub-ranges
are used:
– Band 1: 420.0625 to 421.0125 MHz
– Band 2: 424.5000 to 425.9500 MHz
– Band 3: 429.2625 to 429.7125 MHz
433.0500 to 434.7900 MHz
441.7500 to 441.9750 MHz
608.0125 to 613.9875 MHz

Frontends

Frontends
US Frontend
TOCO Frontend
Transducer Specifications
Analog
Digital
US Intensity Peak-negative acoustic pressure
Output beam intensity
(= temporal average power/area)
Spatial-peak temporal average intensity
US Frequency
US Signal range
US Burst Repetition Rate
US LF Frequency Passband
FMP Signal Range (rti)
FMP Frequency Passband
Signal Range
Offset Compensation (offset adjust at the fetal monitor)
Measurement Range
Resolution
Sensitivty
Baseline Drift due to Temperature Changes
frequency modulation (frequency range depends on
frontend board)
FSK 1.6kHz and 2.4kHz
Frequency Bands
Major countries
Japan
Most European countries, Singapore (ISM band)
Norway
This is the default ten-channel band within the ISM band approved by
the local authorities. Other channels (for transducers using specific
fixed frequencies within the ISM band) may additionally be approved for
use. Contact Philips Support for further information.
US medical telemetry (WMTS) band, Canada, Australia and New Zea-
land
10 Specifications
p = (27.4 ± 4.6) kPa
_
I = (2.64 ± 0.83) mW/cm
ob
2
I = (7.0 ± 2.3) mW/cm
spta
1 MHz
3.5 Vpp to 350 Vpp @ 200 Hz
3.2 kHz
110 to 450 Hz ± 20%
200 Vpp to 40 mVpp
10 to 90 Hz ± 20%
0 to 127 units
+100 to -200 units
-100 to 300 units
0.25 units
2.5g/unit (0.1 oz/unit)
1 unit/min/°C (free air)
5 units/min/°C (underwater)
2
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