The RH6331 is digitally tunable filter operating from 30 MHz to 88MHz. Parallel interface is used for tuning. The module can be installed either in receiving or transmitting tract. RH6331 has low insertion losses, high RF power handling, wide operating temperature range and fast tuning speed. The module can work in frequency-hopping spread spectrum mode.

RH6331

Specification:

Frequency Coverage 30 to 88 MHz
Input/Output Impedance: 50 Ω
In-band Input/Output VSWR 2:1
In-band RF Power Handling 20 Watt (input)
Out-band RF Power Handling Up to 50 Watt
In-band Second Order Intercept Point +100 dBm (input)
In-band Third Order Intercept Point +50 dBm (input)
Center Frequency Drift: ±80 PPM/ºC
Tuning Control Parallel
Tuning Speed 25 µS
DC Power Consumption (Static) 5V @ 2A
Shape Factor (30 dB/ 3 dB) 7 typical
Operating TemperatureRange -40°C to +65°C
Size: 102x76x65 mm
Weight: 460 g
RF Connection SMA

RH6331 specification

# Bandwidth (3 dB), % Insertion Loss, dB Shape factor (30 dB)
Overall Low Side High Side
4 3.5/4.5 2.9/3.6 6.1/6.5 6.8/7.2 5.1/5.6
6 5.5/6.5 1.4/1.7 6.5/6.8 7.25/7.65 5.35/5.8

Note: table values are shown as average/maximum.

Frequency response functions and VSWR functions

Some frequency response functions and VSWR functions are shown below:

f0: 30 MHz;

Bandwidth: 5.97%;

VSWR: 1.06;

OIL: –1.33 dB;

OIL–20%: –29.96 dB;

OIL+20%: –33.60dB.

f0: 50.18 MHz;

Bandwidth: 5.82%;

VSWR: 1.08;

OIL: –1.49 dB;

OIL–20%: –28.56 dB;

OIL+20%: –34.46dB.

f0: 70.13 MHz;

Bandwidth: 5.7%;

VSWR: 1.09;

OIL: –1.26 dB;

OIL–20%: –29.18 dB;

OIL+20%: –35.98dB.

f0: 88 MHz;

Bandwidth: 5.76%;

VSWR: 1.33;

OIL: –1.23 dB;

OIL–20%: –30.02 dB;

OIL+20%: –36.58dB.

Note: f0 — tuning frequency;VSWR — VSWR at f0 frequency;OIL — insertion loss at f0;
OIL–20% — insertion loss at 0,8f0;OIL+20% — insertion loss at 1,2f0.

RH6331 performance

The following diagrams show value of Insertion Loss at f0, Insertion Loss at 0.8f0, Insertion Loss at 1.2f0 and VSWR at each tuning frequency.

D:\PS_Tuning\PS88_OIL.bmp

Insertion Loss at f0

D:\PS_Tuning\PS88_VSWR.bmp

VSWR

D:\PS_Tuning\PS88_OIL+20.bmp

Insertion Loss at 1.2f0

D:\PS_Tuning\PS88_OIL-20.bmp

Insertion Loss at 0.8f0

Pinout & Ratings

PIN # Reference designator Description Notes
1 A2 Tune Bit 2 Active: 5V; Inactive: 0V
2 A3 Tune Bit 3 Active: 5V; Inactive: 0V
3 A4 Tune Bit 4 Active: 5V; Inactive: 0V
4 A5 Tune Bit 5 Active: 5V; Inactive: 0V
5 A6 Tune Bit 6 Active: 5V; Inactive: 0V
6 A7 Tune Bit 7 Active: 5V; Inactive: 0V
7, 9, 11, 12 GND Digital/RF Ground
8 VCC +5V Power Supply Input 4.75 to 5.25V @ 800mA
10 N/C No Connect
13 STB Strobe Active: 0V; Inactive: +5V
14 A0 Tune Bit 0 Active: 5V; Inactive: 0V
15 A1 Tune Bit 1 Active: 5V; Inactive: 0V

Parallel interface description

Serial interface consists of 9 signals: A0-A7 (tuning frequency code) and STB (strobe). Tuning frequency code is calculated by X10 conversion into binary code. X10 is calculated by the formula:

f0 — tuning frequency; fl — low frequency of the band; fh — high frequency of the band.If you wish to tune to 62.48 MHz, the tune word is:

Time carts are shown below.

Mechanical Outline

Note:sizes are shown in millimeters.