Model 1200-88 Instruction Manual IF Amplifier August 2010 Rev. A MODEL 1200 G1=-10 G2=+15 CH1 PEAK CH2 PEAK POWER REMOTE ALARM LVL1=<+5 LVL2= +12 AMPLIFIER MENU CROSS TECHNOLOGIES INC. EXECUTE Data, drawings, and other material contained herein are proprietary to Cross Technologies, Inc., but may be reproduced or duplicated without the prior permission of Cross Technologies, Inc. for purposes of operating the equipment. Printed in USA. When ordering parts from Cross Technologies, Inc.
INSTRUCTION MANUAL MODEL 1200-88 Dual IF Amplifier TABLE OF CONTENTS Warranty 1.0 General 1.1 Equipment Description 1.2 Technical Characteristics 1.3 Monitor & Control Interface 2.0 Installation 2.1 Mechanical 2.2 Rear Panel Inputs & Outputs 2.3 Front Panel Controls & Indicators 2.4 Operation 2.5 Menu Settings 3.0 Environmental Use Information PAGE 2 3 3 4 5 7 7 8 9 10 11 14 WARRANTY - The following warranty applies to all Cross Technologies, Inc. products. All Cross Technologies, Inc.
MODEL 1200-88 Dual IF Amplifier 1.0 General 1.1 Equipment Description The 1200-88 IF Amplifier is a dual channel amplifier each providing manual gain control (MGC) for a 0.1 to 100 MHz IF signal for a -50 to 0 dBm input signal. The gain can be manually adjusted from -25 to +25 dB for up to a +10 dBm output. The 1200-88 has a band limiting lowpass filter. Multi-function push button switches select the gain of each channel (-25 to +25 dB, selectable in 1 dB steps) and the settings appear on the LCD display.
1.2 Technical Characteristics TABLE 1.0 1200-88 Dual IF Amplifier, Technical Specifications (each amp)* Input Characteristics Impedance/Return Loss 50Ω / 18 dB Frequency 0.1 to 100 MHz Input Level -50 to 0 dBm Input, 1 dB Compression +5 dBm @ Minimum Gain Output Characteristics Impedance/Return Loss 50Ω / 18 dB Output Level +10 dBm, Maximum Output 1 dB Compression +15 dBm Channel Characteristics Gain Range (adjustable) -25 to +25 (Front Panel Adjustable) Frequency Response ±1.0 dB, 0.
1.3 Monitor and Control Interface A) Remote serial interface Protocol: RS-232C, 9600 baud rate, no parity, 8 data bits, 1 start bit, and 1 stop bit. Connector: Rear panel, DB-9 male. J10 Pinouts (RS-232C/422/485) Pin Function 1 Rx- 2 Rx+ (RS-232C) 3 Tx+ (RS-232C) 4 Tx- 5 GND 6 Alarm Relay: Common 7 Alarm Relay: Normally Open 8 Not Used 9 Alarm Relay: Normally Closed B) Status Requests - Table 1.1 lists the status requests for the 1200-88 and briefly describes them. Table 1.
C) Commands Table 1.2 lists the commands for the 1200-88 and briefly describes them. After a command is sent the 1200-88 sends a return “>” indicating the command has been received and executed. General Command Format - The general command format is {aaCND...}, where: { = start byte aa = address (RS-485 only - option Q) C = 1 character, either C (command) or S (status) N = 1-digit command or status number, 1 through 9 D = 1 character or more of data (depends on command) } = stop byte Table 1.
2.0 Installation 2.1 Mechanical The 1200-88 consists of one RF/Controller PCB housed in a 1 RU (1 3/4 inch high) by 16 inch deep chassis. A switching, ± 12, +24, +5 VDC power supply provides power for the assemblies. The 1200-88 can be secured to a rack using the 4 holes on the front panel. Figure 2.1 shows how the 1200-88 is assembled. POWER SUPPLY FIGURE 2.1 Mechanical Assembly 1200-88 Manual, Rev.
2.2 Rear Panel Input/Output Signals - Figure 2.2 shows the input and output connectors on the rear panel. AC - POWER IN AC input for switching power supply. 100-240 ±10% VAC, 47-60 Hz. J2 - CH1 INPUT 0.1-100 MHz input, -50 to 0 dBm BNC female 50Ω AC J10 - MONITOR AND CONTROL DB9 female connector. see Table 2.1. J1 - CH1 OUTPUT 0.
2.3 Front Panel Controls and Indicators - Figure 2.3 shows the front panel controls and indicators. DS3 - CH1 PEAK LED Red LED indicates CH1 output level exceeds +13dBm. DS1 - CH2 PEAK LED Red LED indicates CH2 output level exceeds +13dBm. LCD DISPLAY Display shows Gain in dB and output level ±1dB in dBm. Gain 1 Gain 2 CH1 PEAK CH2 PEAK DS6 - POWER LED Green LED indicates presence of DC power. POWER REMOTE DS5 - REMOTE LED Yellow LED indicates remote operation.
2.4 Operation 2.4.1 Installing and Operating the 1200-88 Dual IF Amplifier 1. Connect -50 dBm to 0 dBm signals to CH1 IF In, J2, and CH2 IF In, J4 (Figure 2.2) 2. Connect the IF OUTPUTS, J1 and J5, to the external equipment. 3. Connect 100-240 ±10% VAC, 47 - 63 Hz to AC on the back panel. 4. Set the gain for -25 to +25 dB on each channel for a maximum output level of +10 dBm for each channel. (See Section 2.5 Menu Settings). 5. Be sure DS6 (green, DC Power) is on and DS2 (red, Alarm) is off (Figure 2.3). 6.
2.5 Menu Settings 2.5.1 Functions This section describes operation of the front panel controls. There are three operator switches, the LCD display and alarm indicator LEDs. All functions for the equipment are controlled by these components. The functions are (see Figure 2.
2.5.3 Control Switches 1. Menu/Execute - Any change to the programming of the unit must be initiated by pressing the Menu/Execute switch and completed by pressing the Menu/Execute switch. 2. Horizontal Switch - This switch is mounted so its movement is horizontal and moves the cursor left or right. 3. Vertical Switch - This switch is mounted so its movement is vertical and has two functions: a. During gain changes, the vertical movement will raise or lower the number in the direction of the arrows. b.
2.5.5 Alarm Indications An alarm condition will occur if the +12 VDC voltage that powers the amplifiers is lost. The CH1 and CH2 peak indicators will light when an output level of greater than +13 dBm is detected. The Remote LED will light when the Remote mode is selected. ON POWER UP REV 1.
3.0 Environmental Use Information A. Rack-Mounting - To mount this equipment in a rack, please refer to the installation instructions located in the user manual furnished by the manufacturer of your equipment rack. B. Mechanical Loading - Mounting of equipment in a rack should be such that a hazardous condition does not exist due to uneven weight distribution. C.
CROSS TECHNOLOGIES, INC. 6170 Shiloh Road Alpharetta, Georgia 30005 (770) 886-8005 FAX (770) 886-7964 Toll Free 888-900-5588 WEB: www.crosstechnologies.com E-MAIL: info@crosstechnologies.com Printed In USA 1200-88 Manual, Rev.
