Eujgoov 0~55MHz DDS Signal Generator AD9850 with LCD Display for Development Clock Rate Frequency Bands

Features: ISB, USB, CW are the three mode choices. DT is signal from main board. Keys & Connection interfaces: ENC: Encoder switch MEM: Switch for memory mode VFO: Transfer from VFO A to VFO B, or from VFO B to VFO A. SSB: Working mode change: circulate from USB, LSB, AM, CW, and on and on... RIT: Fine tuning to receiving frequency CAL: Set functions KB-1 and KB-2 have common shared pin, but is not GND Specification: Weight:115g Size: Approx. 8.2 x 4.5cm/3.2 x 1.8inch Notes: 1. DDS SYSTEM CLK: can use frequency tester to get 30MHz oscillator, multiply the tested value at 6, then put the multiplied value here. If using AD9851, make initial setting at 180000000. 2. OFFSET FREQ: can be set as + or - . Rotate encoder switch to change value, press STEP key, then rotate encoder switch to adjust step. Minimum working frequency plus (+) offset frequency should be high than 0 (zero). Frequency display: RX = MULTIPLIER x (RX_DDS_FREQ + OFFSET_FREQ) TX = MULTIPLIER x (RX_DDS_FREQ + OFFSET_FREQ + TX_OFFSET_FREQ) The frequency programmed into the DDS, is calculated as shown below. RX = ABS(RX_DDS_FREQ) TX = ABS(RX_DDS_FREQ + TX_OFFSET_FREQ) RX_DDS_FREQ, MIN_RX_DDS_FREQ, MAX​​_RX_DDS_FREQ, TX_OFFSET_FREQ & OFFSET_FREQ Examples: 1. DDS output range 30~40MHz: MIN_RX_DDS_FREQ MAX​​_RX_DDS_FREQ OFFSET_FREQ RX Frequency display range. 30 MHZ 40 MHz 100 MHz = 130 MHz to 140 MHz. Note 1 30 MHZ 40 MHz -10 MHz = 20 MHz to 30 MHz. / -40 MHZ -30 MHz 170 MHz = 140 MHz to 130 MHz. Note 2 -40 MHZ -30 MHz 60 MHz = 30 MHz to 20 MHz. 2. Setting FT180A with DDS: ENABLE RPT NO X6 RECLK X6 DDS SYSTEM CLK 180M MAX​​ DDS FREQ 65M MIN RX DDS FREQ 10.701M (Offset frequency + RIT frequency) MAX​​ RX DDS FREQ 60M TX OFFSET FREQ 0 MAX​​ RIT OFFSET 1K (RIT frequency) OFFSET FREQ -10.700M - (Offset frequency) MULTIPLIER 1 Package

• HIGH-PERFORMANCE DDS GENERATOR: This 0-55MHz DDS Generator is based on the advanced AD9850 chip for reliable performance and easy operation
• MULTI-FREQUENCY BANDS: Supports continual adjustment from 0-55MHz in 1Hz increments with 6 frequency bands available for versatile use
• STABLE VOLTAGE REGULATION: Equipped with a 78L05 voltage regulator to ensure stable operation with recommended input voltage of 8-9V to prevent overheating
• EASY OPERATION: Simple to use with clear instructions for setting various parameters such as frequency, clock mode, and working frequency
• WIDE RANGE OF APPLICATIONS: Suitable for DIY enthusiasts, radio hobbyists, and electronic developers for testing, evaluating, and developing waveform and frequency output
• MULTIPLE WORKING MODES: Features three operational modes including ISB, USB, and CW with mode switching capabilities for USB, LSB, AM, and CW configurations
• COMPACT DESIGN WITH LCD DISPLAY: Measures approximately 8.2 x 4.5cm and weighs 115g, featuring an integrated LCD display for clear frequency readings and parameter monitoring