RPTED CONVERGING XING COURSE SIT WITH VISUAL SEPARATION APPLIED BY EMD120. RPTR IMPLIES B737 FLC CONFUSION ABOUT WHAT EMB120 WAS GOING TO DO REF THEIR ACFT.

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ACFT #2 DEPARTING RWY 16R; FLYING RWY HDG; CLBING. ACFT #1 DEPARTING RWY 10; FLYING RWY HDG; CLBING. ACFT #2 WAS L RWY HDG; AND HIS ON COURSE HDG WOULD BE 350 DEGS. AS SOON AS ACFT #2 PASSED THROUGH THE INTXN OF RWY 10; ACFT #1 WAS CLRED FOR TKOF. ACFT #2 WAS ABOUT 1 1/2 MI S AND WAS GIVEN A L TURN TO HDG 110 DEGS AND WAS TOLD ABOUT THE B737 AND TO RPT THE ACFT IN SIGHT. ACFT #2 SOON RPTED THE B737 IN SIGHT. I THEN TOLD THE PLT TO MAINTAIN VISUAL SEPARATION TURN L TO 350 DEGS. I THEN WENT BACK TO THE B737; ISSUED THE TFC AND WHAT THE PLT OF ACFT #2 WAS DOING. THE PLT OF THE B737 RPTED THAT THE E120 WAS ALSO IN SIGHT. I THEN SHIPPED THE PLT OF ACFT #1 TO DEP. THE PLT OF ACFT #2 ASKED IF THE B737 WAS GOING TO TURN AND ALSO ASKED IF THE B737 HAD A RESTR CLB. I SAID NEGATIVE AND IF NEEDED HE CAN HAVE A R TURN TO THE VOR THEN ON COURSE. THE PLT OF ACFT #2 SAID I'VE GOT IT NOW. I ROGERED AND SHIPPED HIM TO DEP. THE CONFUSION AROSE BECAUSE ACFT #1 WASN'T COMPLETELY AWARE OF WHAT ACFT #2 WAS GOING TO DO. ALSO A FACTOR WAS MY DECISION TO LET THE PLTS WORK OUT THE XING COURSES. I COULDN'T HOLD THE DEP OF ACFT #1 TOO LONG; I HAD TFC TO LAND RWY 10. SOME OF THE SOLUTIONS ARE AS FOLLOWS: HOLD ACFT #1 SHORT TO GIVE AMPLE SPACING. TURN ACFT #2 TO THE R FROM THE START. LEAVE THEM BOTH ON RWY HDG AND CLBING. KEEP ALL ACFT ON MY FREQ SO AS TO INFORM THEM OF EVERYTHING THEN SHIP THEM TO DEP AFTER THEY HAVE CROSSED. LESSON LEARNED: SAFETY FIRST; ORDERLY; EXPEDITIOUS LAST.