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| 型號： | 3NF-50/100-S |
| 英文描述： | 3 SECTIONS - 3 SECTIONS, 50 MHz - 100 MHz, TUNABLE BRF |
| 文件頁數(shù)： | 4/4頁 |
| 文件大?。?/td> | 114K |
| 代理商： | 3NF-50/100-S |
1725 N. Salisbury Blvd. PO Box 2828 Salisbury, MD 21802
P: 800-780-2169, 410-860-5100 F: 410-860-1949 www.lorch.com lorchsales@lorch.com
37
Tunable Filters — Digital
24 MHz to 3000 MHz
Octave Tuning
High Position Resolution
Built in Backlash Compensation
Simple Command Structure
Lorch’s Standard Digitally Controlled Bandpass Filters are
available with 3 or 5 sections in the frequency range of 25
MHz to 3000 MHz. The typical insertion loss at center
frequency ranges from 0.7 dB to 1.0 dB and standard tuners
have a 3 dB passband bandwidth of 5%. Digitally
Controlled Bandreject Filters are also available. Standard
Bandreject Filters have 3 or 5 sections with a center
frequency between 25 MHz to 220 MHz and a notch depth
of 50 dB to 75 dB. The rejection bandwidth is typically 1%.
All Standard Digitally Controlled Filters have a dial
accuracy of better than 0.5%. The filter is controlled by
sending commands as ASCII strings to the RS232 port.
Communications:
The controller communicates via a RS232-C port with the following settings:
9600 BAUD, 8 Bits/Byte, No parity, 1 stop bit. If a PC us used to send commands to the controller, a standard serial
cable must be connected to the RS232 port of the filter.
Power Supply:
The digitally controlled filter is supplied with a 24 VDC, 0.625 mA, universal power supply. Typically a filter draws
about 250 mA of current.
Lifetime Expectancy & Servicing:
Lorch’s Digitally Controlled Filters do not require servicing. The meantime to failure is calculated at approximately
1,000,000 tune commands (based on 1 tune command every 30 seconds over 1 year) and is mainly determined by the
limited number of write cycles to EEPROM to keep track of the current frequency setting.
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