Moseley PCL6000
4-5
Moseley PCL 6000 Document No. 602-13375-01 Rev.B
one bit switch that sets 64 MHz. S1, S2, and S3 are four-bit switches set to a hex value
(0,1,2,3,4,5,6,7,8,9, A,B,C,D,E,F), where A–F corresponds to 10–15. The transmitter frequency
example below illustrates the math.
Transmitter frequency example:
1st LO
=
1020.000
MHz
Carrier Freq =
- 950.500
FMO Freq
=
70.500
MHz
SWITCH SETTINGS:
S4-1
1
X
64
=
64.000
MHz
S1
1
X
4
=
4.000
S2
A
X
.25
=
2.500
S3
0
X
.025
=
0.000
70.500
MHz
(Note: See section 5.3.9 for changing the STL frequency in the field)
4.2.2.2 1st Local Oscillator (950 MHz/1.7 GHz)
The 1st LO signal is derived from crystal-controlled oscillator Q5. The fifth overtone crystal (Y1;
102.000 MHz for 950 MHz, 92 MHz for 1.7 GHz) is temperature stabilized by a 65°C
proportionally controlled oven (HR1). Oscillator buffers Q6 and AR1 isolate the oscillator and
amplify the signal, preventing frequency pulling when adjusting the multipliers.
The output of the buffer is doubled in an active push-push doubler. The single-ended input from
the buffer is split into two out-of-phase voltages in T1 and applied to the bases of Q7 and Q8. The
output of these two transistors is summed at their collectors.
The output of the doubler is tuned by C94 and L14 and is impedance matched to the step-
recovery diode multiplier by C95 and C96. The diode self-bias current is determined by RT1. The
step-recovery diode (CR14) forms the heart of a X5 multiplier (C98, C99, and the 12 nH printed
inductor). The multiplier converts the input sinusoidal signal to a stream of impulses. These
impulses are fed to an LC output circuit (L16 and C101) which is tuned to the desired output
frequency. The three pole helical filter (FL10) is tuned to the LO output frequency (1020 MHz
nominal for 950 MHz, 920 MHz nominal for 1.7 GHz). The output is terminated into a 3 dB
attenuator, reducing the output power to that required by the 1st mixer and providing a wideband
match for the filter. The undesired harmonics are suppressed at least 40 dB. The output power is
b5 and +9 dBm.
4.2.2.3 1st Local Oscillator (220 MHz)
The 1st LO signal is derived from crystal-controlled oscillator Q5. The fifth overtone crystal (Y1,
97.000 MHz nominal) is temperature stabilized by a 65°C proportionally controlled oven.
Содержание PCL-600
Страница 1: ...User Manual Moseley PCL 6000 Doc 602 13375 01 January 2008...
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Страница 30: ...1 18 System Characteristics Moseley PCL 6000 Document No 602 13375 01 Rev B...
Страница 32: ...1 20 System Characteristics Moseley PCL 6000 Document No 602 13375 01 Rev B...
Страница 40: ...2 8 Installation Moseley PCL 6000 Document No 602 13375 01 Rev B Figure 2 3 Typical PCL6000 Site Installation...
Страница 64: ...3 10 Operation Moseley PCL 6000 Document No 602 13375 01 Rev B...
Страница 86: ...4 22 Module Characteristics Moseley PCL 6000 Document No 602 13375 01 Rev B...
Страница 133: ...Moseley PCL6000 5 47 Moseley PCL 6000 Document No 602 13375 01 Rev B...
Страница 134: ......
Страница 138: ...6 4 Customer Service Moseley PCL 6000 Document No 602 13375 01 Rev B...
Страница 149: ...Moseley PCL6000 7 11 Moseley PCL 6000 Document No 602 13375 01 Rev B 930 03462 01 Rev H Transmitter RF Module Assembly...
Страница 151: ...Moseley PCL6000 7 13 Moseley PCL 6000 Document No 602 13375 01 Rev B 20B3037 Rev B RF Amplifier 220 MHz Assembly...
Страница 153: ...Moseley PCL6000 7 15 Moseley PCL 6000 Document No 602 13375 01 Rev B 21B2892 Rev D 6030 Receiver Final Assembly...
Страница 163: ...Moseley PCL6000 7 25 Moseley PCL 6000 Document No 602 13375 01 Rev B 930 03595 01 Rev J Receiver RF Module 6030 Assembly...
Страница 165: ...Moseley PCL6000 7 27 Moseley PCL 6000 Document No 602 13375 01 Rev B 20B2941 Rev C IF DEMOD 6020 Assembly...
Страница 167: ...Moseley PCL6000 7 29 Moseley PCL 6000 Document No 602 13375 01 Rev B 20B3039 Rev E Double Converter LO3 6030 Assembly...
Страница 169: ...Moseley PCL6000 7 31 Moseley PCL 6000 Document No 602 13375 01 Rev B 20B2949 Rev G FM Demod 6030 Assembly...
Страница 181: ...Moseley PCL6000 7 43 Moseley PCL 6000 Document No 602 13375 01 Rev B 930 03462 013 Rev H Transmitter RF Module Assembly...
Страница 183: ...Moseley PCL6000 7 45 Moseley PCL 6000 Document No 602 13375 01 Rev B 20B3038 Rev A RF Amplifier 330 MHz Assembly...
Страница 185: ...Moseley PCL6000 7 47 Moseley PCL 6000 Document No 602 13375 01 Rev B 20B2958 Rev D RF Amplifier 450 MHz Assembly...
Страница 187: ...Moseley PCL6000 7 49 Moseley PCL 6000 Document No 602 13375 01 Rev B 21B2892 4 Rev D 6030 Receiver Final Assembly...
Страница 199: ...Moseley PCL6000 7 61 Moseley PCL 6000 Document No 602 13375 01 Rev B 20B2941 2 Rev C IF DEMOD 6020 Assembly...
Страница 201: ...Moseley PCL6000 7 63 Moseley PCL 6000 Document No 602 13375 01 Rev B 20B3039 Rev E Double Converter LO3 6030 Assembly...
Страница 203: ...Moseley PCL6000 7 65 Moseley PCL 6000 Document No 602 13375 01 Rev B 20B2949 Rev G FM Demod 6030 Assembly...
Страница 215: ...Moseley PCL6000 7 77 Moseley PCL 6000 Document No 602 13375 01 Rev B 91B7379 Rev C RF Amplifier 950 MHz 6w Schematic...
Страница 217: ...Moseley PCL6000 7 79 Moseley PCL 6000 Document No 602 13375 01 Rev B 21B2891 1 Rev D 6020 Receiver Final Assembly...
Страница 219: ...Moseley PCL6000 7 81 Moseley PCL 6000 Document No 602 13375 01 Rev B 21B2915 Rev D 6060 Receiver Final Assembly...
Страница 231: ...Moseley PCL6000 7 93 Moseley PCL 6000 Document No 602 13375 01 Rev B 91D7274 2 Rev J Preamp 1st Mixer 6060 Schematic...
Страница 233: ...Moseley PCL6000 7 95 Moseley PCL 6000 Document No 602 13375 01 Rev B 91B7375 Rev C IF Demod 6020 Schematic...
Страница 237: ...Moseley PCL6000 7 99 Moseley PCL 6000 Document No 602 13375 01 Rev B 91B7387 Rev F FM Demod 6030 6060 Schematic...
Страница 251: ...Moseley PCL6000 7 113 Moseley PCL 6000 Document No 602 13375 01 Rev B 930 03462 01 Rev H Transmitter RF Module Assembly...
Страница 255: ...Moseley PCL6000 7 117 Moseley PCL 6000 Document No 602 13375 01 Rev B 21B2927 Rev C 6030 Receiver Final Assembly...
Страница 267: ...Moseley PCL6000 7 129 Moseley PCL 6000 Document No 602 13375 01 Rev B 20B3039 Rev E Double Converter LO3 6030 Assembly...
Страница 269: ...Moseley PCL6000 7 131 Moseley PCL 6000 Document No 602 13375 01 Rev B 20B2949 Rev G FM Demod 6030 Assembly...
Страница 271: ...Moseley PCL6000 7 133 Moseley PCL 6000 Document No 602 13375 01 Rev B 20C3104 Rev A Channel Control Assembly...
Страница 273: ...Moseley PCL6000 7 135 Moseley PCL 6000 Document No 602 13375 01 Rev B 917515 Rev A Channel Control Schematic 2 of 4...
Страница 275: ...Moseley PCL6000 7 137 Moseley PCL 6000 Document No 602 13375 01 Rev B 917515 Rev A Channel Control Schematic 4 of 4...
Страница 277: ...Moseley PCL6000 7 139 Moseley PCL 6000 Document No 602 13375 01 Rev B 910 08614 01 Rev B PCL 6020 Multichannel Option...