Description
STB3338S is a two-way RF amplifier with 1.2GHz bandwidth, and supports DOCSIS3.1.
STB3338S uses GaAs power doubler gain block, thus ensuring excellent CTB and CSO performance.
STB3338S uses standard JXP plug-in PADs for all adjustments of both attenuation and equalization to reduce spare devices.
STB3338S is an ideal product for upgrading distribution network of cable TV system.
Features
?1.2GHz bandwidth
?GaAs technology in use
?Standard JXP plug-in PADs for all adjustments of both attenuation and equalization
?Lightning and surge protection @ RF input and output ports
?Second output can be selected flexibly via a splitter or tap
?Compact design, small size
?Low noise, low power consumption
Block Diagram
Specifications
Table1. Forward Section Specifications
|
Item
|
Unit
|
Value
|
|
Pass Band
|
MHz
|
258 – 1200 (other optional)
|
|
Minimum Full Gain 1）
|
dB
|
38
|
|
Flatness
|
dB
|
± 0.75
|
|
Reference Output Level
|
dBuV
|
109 @ single output port
105 @ two output ports via a splitter
|
|
Attenuator Adjustable Range
|
dB
|
0 – 20 (1dB step)
|
|
Equalizer Adjustable Range
|
dB
|
0 – 20 (1dB step)
|
|
Return Loss
|
dB
|
16 @ 258 – 860 MHz
14 @ 860 – 1200 MHz
|
|
RF Test Port
|
dB
|
- 20
|
|
Noise Figure 1）
|
dB
|
9
|
|
Group Delay
|
ns
|
20
|
|
CTB 2）
|
dB
|
65
|
|
CSO 2）
|
dB
|
65
|
|
Gain Stability
|
dB
|
± 1
|
Table2. Reverse Section Specifications
|
Item
|
Unit
|
Value
|
|
Pass Band
|
MHz
|
5 – 204 (other optional)
|
|
Minimum Full Gain 1）
|
dB
|
21
|
|
Flatness
|
dB
|
± 0.5
|
|
Attenuator Adjustable Range
|
dB
|
0 – 20 (1dB step)
|
|
Equalizer Adjustable Range
|
dB
|
0 – 10 (1dB step)
|
|
Max. Output Level
|
dBuV
|
110
|
|
Hun Modulation
|
％
|
1
|
|
Group Delay
|
ns
|
20
|
|
Carrier to Second Order Intermodulation Ratio
|
dB
|
52
|
|
Return Loss
|
dB
|
16
|
|
RF Test Port
|
dB
|
- 20
|
|
Noise Figure 1）
|
dB
|
8.5
|
Table3. General Specifications
|
Item
|
Unit
|
Value
|
|
Power Supply Voltage
|
VAC
|
60 (other optional)
|
|
Power Consumption
|
W
|
22
|
|
Dimensions (W x H x D)
|
mm
|
250 x 200 x 110
|
|
Weight
|
kg
|
2.3
|
|
Operating Temperature
|
°C
|
- 25 – + 55
|
|
Storage Temperature
|
°C
|
- 55 – + 70
|
|
Relative Humidity
|
%
|
5 – 90 (non-condensing)
|
|
Water/Dust Ingress Protection Rating
|
-
|
IP67
|
|
Surge
|
kV
|
5 （10/700ns）
|
|
RF Connector and Power Supply Port
|
inch
|
5/8-24 (F – female optional)
|
Note:
1) Gain and Noise Figure measured with 4 dB inter-stage PAD, other EQ and PAD are 0 dB.
2) Distortion performance reference output level is 49 dBmV (single output port) or 45 dBmV (two output ports via a splitter), 4 dB inter-stage PAD, 16 dB inter-stage EQ, 11 dB output tilt from 258 – 1200 MHz. Loaded with 36 PAL D/K CW carriers from 258 – 550 MHz. Digital refers to 550 MHz – 1 GHz loading with QAM carriers at -10 dB relative to analog CW carrier levels.
3) Unless otherwise noted, all specifications reflect typical performance and are referenced to 20°C.
Ordering information
|
Product Description
|
Part Number
|
|
STB3338S 1.2GHz RF Amplifier, 204/258 split, second port via a splitter, 60VAC power supply
|
STB3338S-2-02-60
|
|
STB3338S 1.2GHz RF Amplifier, 85/105 split, second port via a 10dB tap, 220VAC power supply, European power cord
|
STB3338S-8-10-2E
|
|
STB3338S 1.2GHz RF Amplifier, other optional
|
STB3338S-a-bb-cc
a ─ Pass band split
2 – 204/258 MHz
8 – 85/105 MHz
bb ─ Second output port type
00 – No second port
02 – Splitter
xx – xx dB tap
cc ─ Supply voltage, power cord
1A – 110VAC, American cord
2C – 220VAC, Chinese cord
2E – 220VAC, European cord
60 – 60VAC, 5/8 inch port
|
