MODEL NO.
100D1797
Modulator Sub-Assembly
FEATURES
45 - 70 MHz
High Isolation
30 nSec Switching Speed
Integrated SPST Blanking Switch, Bi-Phase
Modulators, and Digital Attenuators
High Pass Filters for Reduced Transients
0.5 dB LSB / 127.5 dB Attention Range
TTL Control
HDI
DAICO Industries Rev. A / Iss. 1
J1
J2
J3
SPST
SWITCH
(SW.1)
BI-PHASE
MODULATOR
(MOD 1)
2-WAY
PWR DIVIDER
(P1)
8 BIT ATTENUATOR
.5dB 127.5 dB
LSB RANGE
8 BIT ATTENUATOR
.5dB 127.5 dB
LSB RANGE
BI-PHASE
MODULATOR
(MOD - 3)
BI-PHASE
MODULATOR
(MOD - 2)
30 MHz
HI-PASS
FILTER
30 MHz
HI-PASS
FILTER
TYPICAL PERFORMANCE
at 25°C
I.L. (dB) ISO (dB)
FREQUENCY (MHz)
40 100 400 1000
0
15
30
60
0
10
20
30
40
VSWR
1.0
1.2
1.4
1.6
1.8
45
20
I. LOSS
VSWR
ISO
GUARANTEED PERFORMANCE
Parameter Min Typ Max Units Conditions
Operating Frequency 45 70 MHz
DC Current 1 2 A At +5 VDC Supply
Control Type TTL 20 Line
Switch Modulator “1” = Thru “0” = Off
Phase Modulator “1” = 0 DEG “0” = 180°
Attenuation Bits “1” = ATTN “0” = Thru
Control Current High 1 ±200 µA VIH = +2.7V
Low -60 ±200 µA VIL = +0.5V
Insertion Loss 16 20 dB
Balance Between Channels 0.1 ±0.5 dB
Phase Difference +0.4 ±2 DEG Insertion Loss State
Isolation 70 83 dB J1 - J2, J1- J3 (SW1 Off)
40 43 dB J2 - J3
Attenuation LSB 0.5 dB
Range 0 127.5 dB 0.5, 1, 2, 4, 8, 16, 32, 64
Accuracy dB ±(0.15 + 2% of Atten. Setting in dB)
VSWR Input 1.2/1 1.3/1 J1, Input
Output 1.4/1 1.6/1 J2, J3 Outputs
Impedance 50 OHMS
Switching Speed 30 50 nSec 50% TTL to 90% / 10% RF
Transition (Rise/Fall) Time 20 nSec All SW., Mods, + Bits
Intercept Points 2nd +38 dBm 40 MHz / 30 MHz
3rd +10 dBm 20 MHz / 30 MHz
RF Power Operate +14 +10 dBm 0.1 dB Compression
No Damage +27 dBm
Operating Temperature 0 +25 +60 °CTA
PART IDENTIFICATION
J1
J2
J3
J4
3.50 TYP
CONNECTOR, 37 PIN
M24308/3-4
5.00
4.00
±.03
12.00 ±.03
PIN 1
.19
1.30
MAX
CONNECTOR, SMA
FEMALE 3 PLACES
.xx = .02
.xxx = .010